/* ============================================================
   PROFILE PAGE — Modern Dark Glassmorphism Theme
   Author: Samsudeen Ashad Portfolio
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
    /* Core palette */
    --color-base: #05070f;
    --color-surface: #0d1322;
    --color-surface-2: #111b30;

    /* Accent spectrum */
    --accent-blue: #4f8dff;
    --accent-purple: #7b61ff;
    --accent-pink: #ff6fae;
    --accent-cyan: #34d2ff;
    --accent-green: #22c993;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #5ea1ff 0%, #8a74ff 48%, #ff77b7 100%);
    --gradient-secondary: linear-gradient(135deg, #22c993 0%, #5ea1ff 100%);
    --gradient-glow: linear-gradient(135deg, rgba(94,161,255,0.45), rgba(138,116,255,0.4), rgba(255,119,183,0.35));
    --gradient-shine: linear-gradient(90deg, transparent, rgba(255,255,255,0.11), transparent);

    /* Glass */
    --glass-bg: rgba(13, 19, 34, 0.72);
    --glass-bg-hover: rgba(19, 28, 47, 0.84);
    --glass-border: rgba(124, 151, 212, 0.24);
    --glass-border-hover: rgba(164, 191, 255, 0.46);
    --glass-blur: blur(18px);

    /* Text */
    --text-primary: #f4f8ff;
    --text-secondary: rgba(233, 241, 255, 0.76);
    --text-muted: rgba(185, 199, 225, 0.74);

    /* Shadows */
    --shadow-sm: 0 6px 14px rgba(5, 10, 24, 0.38);
    --shadow-md: 0 14px 34px rgba(6, 12, 28, 0.5);
    --shadow-lg: 0 24px 60px rgba(4, 8, 20, 0.58);
    --shadow-glow: 0 14px 38px rgba(72, 125, 246, 0.2), 0 0 28px rgba(123, 97, 255, 0.13);
    --shadow-glow-hover: 0 20px 56px rgba(72, 125, 246, 0.28), 0 0 72px rgba(123, 97, 255, 0.2);

    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;

    /* Transitions */
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background:
        radial-gradient(1200px 680px at 10% -10%, rgba(75, 130, 255, 0.2), transparent 60%),
        radial-gradient(900px 520px at 90% 0%, rgba(138, 116, 255, 0.18), transparent 62%),
        radial-gradient(760px 480px at 50% 100%, rgba(255, 119, 183, 0.11), transparent 68%),
        var(--color-base);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    opacity: 0;
    animation: fadeInPage 0.8s ease forwards;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(148, 175, 234, 0.09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 175, 234, 0.09) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(circle at 50% 45%, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(circle at 50% 45%, black 30%, transparent 80%);
    opacity: 0.18;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    width: min(70vw, 820px);
    aspect-ratio: 1;
    right: -15%;
    top: -35%;
    background: radial-gradient(circle, rgba(126, 146, 255, 0.28) 0%, rgba(126, 146, 255, 0) 70%);
    filter: blur(12px);
    pointer-events: none;
    z-index: 0;
}

@keyframes fadeInPage {
    to { opacity: 1; }
}

::selection {
    background: rgba(59,130,246,0.35);
    color: #fff;
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }

/* --- Three.js Background Canvas --- */
.three-bg-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==========================================================
   NAVIGATION
   ========================================================== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(6, 11, 22, 0.72);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid rgba(164, 191, 255, 0.24);
    height: var(--nav-height);
    transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.navbar.scrolled {
    background: rgba(6, 11, 22, 0.9);
    box-shadow: 0 14px 44px rgba(3, 9, 21, 0.56);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo a {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity 0.3s;
}
.nav-logo a:hover { opacity: 0.85; }

.nav-menu {
    display: flex;
    gap: 1.8rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    padding: 0.25rem 0;
    transition: color 0.3s var(--ease-out);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 0.35s var(--ease-out);
}

.nav-link:hover,
.nav-link.active { color: var(--text-primary) !important; }

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px; height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: transform 0.3s var(--ease-out), opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================
   SECTION SHARED STYLES
   ========================================================== */
section {
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    margin-bottom: 0.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    text-shadow: 0 0 28px rgba(96, 154, 255, 0.24);
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Shared elevated card surface */
.profile-card,
.skill-category,
.project-card,
.timeline-content,
.stat-card,
.activity-item,
.cert-category,
.soft-skills-container,
.reference-card,
.contact-item,
.contact-form,
.github-iframe-container {
    background: linear-gradient(160deg, rgba(17, 29, 54, 0.8), rgba(11, 20, 39, 0.8));
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================
   BUTTONS
   ========================================================== */
.btn {
    padding: 0.85rem 1.75rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s, background 0.3s, border-color 0.3s;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
    line-height: 1.4;
    white-space: nowrap;
}
.btn i { font-size: 0.9rem; }

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 10px 26px rgba(92, 143, 255, 0.32);
}
.btn-primary:hover {
    transform: translateY(-3px) scale(1.01);
    box-shadow: 0 16px 36px rgba(92, 143, 255, 0.4), 0 0 24px rgba(123, 97, 255, 0.22);
}

.btn-secondary {
    background: rgba(163, 191, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}
.btn-secondary:hover {
    background: rgba(163, 191, 255, 0.16);
    border-color: var(--glass-border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn-cv {
    background: rgba(16,185,129,0.12);
    color: var(--accent-green);
    border: 1px solid rgba(16,185,129,0.25);
}
.btn-cv:hover {
    background: rgba(16,185,129,0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(16,185,129,0.25);
}

.btn-cv-preview {
    background: rgba(99, 102, 241, 0.12);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.25);
}
.btn-cv-preview:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.25);
}

.btn-outline {
    background: rgba(79, 141, 255, 0.08);
    color: var(--accent-blue);
    border: 1px solid rgba(79,141,255,0.35);
}
.btn-outline:hover {
    background: rgba(79,141,255,0.16);
    border-color: rgba(79,141,255,0.55);
    transform: translateY(-3px);
}

/* ==========================================================
   HERO SECTION
   ========================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: calc(var(--nav-height) + 2rem) 2rem 3rem;
    text-align: center;
    overflow: hidden;
    z-index: 1;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.gradient-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 64% 52% at 20% 28%, rgba(94,161,255,0.2) 0%, transparent 72%),
        radial-gradient(ellipse 56% 66% at 82% 68%, rgba(138,116,255,0.17) 0%, transparent 72%),
        radial-gradient(ellipse 42% 44% at 50% 52%, rgba(255,119,183,0.1) 0%, transparent 72%);
}

/* Floating decorative shapes */
.floating-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(2px);
    animation: shapeFloat 8s ease-in-out infinite;
}

.shape-1 {
    width: 120px; height: 120px;
    top: 15%; left: 8%;
    background: var(--accent-blue);
    animation-duration: 7s;
}

.shape-2 {
    width: 90px; height: 90px;
    top: 55%; right: 10%;
    background: var(--accent-purple);
    border-radius: 30%;
    animation-delay: 2.5s;
    animation-duration: 9s;
}

.shape-3 {
    width: 70px; height: 70px;
    bottom: 18%; left: 18%;
    background: var(--accent-pink);
    border-radius: 25%;
    animation-delay: 5s;
    animation-duration: 8s;
}

@keyframes shapeFloat {
    0%, 100% { transform: translateY(0) rotate(0deg) scale(1); }
    33%      { transform: translateY(-18px) rotate(60deg) scale(1.05); }
    66%      { transform: translateY(10px) rotate(120deg) scale(0.95); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 820px;
}

.hero-title {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 1.25rem;
    color: #fff;
    letter-spacing: -0.03em;
}

.hero-title .highlight,
.hero h1 .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 1.25rem;
    color: #fff;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 620px;
    margin: 0 auto 0.5rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

/* Hero profile card */
.hero-image { margin-top: 2.5rem; }

.profile-card {
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    max-width: 300px;
    margin: 0 auto;
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
}
.profile-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow-hover);
}

.profile-img { margin-bottom: 1rem; }

.profile-avatar {
    width: 130px; height: 130px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center 20%;
    border: 3px solid transparent;
    background-image: var(--gradient-primary);
    background-origin: border-box;
    background-clip: content-box, border-box;
    box-shadow: 0 0 20px rgba(59,130,246,0.2);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
}
.profile-card:hover .profile-avatar {
    transform: scale(1.05);
    box-shadow: 0 0 35px rgba(139,92,246,0.3);
}

.profile-info h3 { color: var(--text-primary); font-weight: 700; margin-bottom: 0.35rem; }
.profile-info p   { color: var(--text-muted); font-size: 0.9rem; }

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem; left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: scrollBounce 2.5s ease-in-out infinite;
}

.scroll-arrow {
    width: 18px; height: 18px;
    border-right: 2px solid var(--accent-blue);
    border-bottom: 2px solid var(--accent-blue);
    transform: rotate(45deg);
    opacity: 0.6;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.6; }
    50%      { transform: translateX(-50%) translateY(-12px); opacity: 1; }
}

/* ==========================================================
   ABOUT SECTION
   ========================================================== */
.about {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.stat { text-align: center; }

.stat h3,
.stat .counter {
    font-size: 2.2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.35rem;
    line-height: 1.2;
}

.stat p {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-container {
    position: relative;
    max-width: 320px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.5s var(--ease-out), box-shadow 0.5s;
}
.image-container:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-glow-hover);
}

.profile-photo {
    width: 100%;
    border-radius: var(--radius-lg);
    object-fit: cover;
    display: block;
}

.image-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(10,10,15,0.9));
    padding: 2rem 1.25rem 1.25rem;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transform: translateY(100%);
    transition: transform 0.4s var(--ease-out);
}
.image-container:hover .image-overlay { transform: translateY(0); }

.overlay-content h4 { font-weight: 700; font-size: 1rem; margin-bottom: 0.2rem; }
.overlay-content p   { font-size: 0.85rem; color: var(--text-muted); }

/* ==========================================================
   SKILLS SECTION
   ========================================================== */
.skills {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
}

.skills::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 25% 20%, rgba(59,130,246,0.04) 0%, transparent 50%),
        radial-gradient(circle at 75% 80%, rgba(139,92,246,0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s, border-color 0.4s;
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.skill-category h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: #fff;
}

.skill-category h3 i {
    font-size: 1.15rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-items { display: grid; gap: 0.75rem; }

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.85rem 1rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    transition: all 0.35s var(--ease-out);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.skill-item::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: var(--gradient-shine);
    transition: left 0.6s ease;
    z-index: 0;
}
.skill-item:hover::before { left: 100%; }

.skill-item:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-3px) scale(1.02);
    border-color: var(--glass-border-hover);
    box-shadow: 0 8px 30px rgba(0,0,0,0.25), 0 0 20px rgba(59,130,246,0.12);
}

/* Skill icon */
.skill-icon {
    width: 40px; height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #fff;
    background: var(--gradient-primary);
    flex-shrink: 0;
    transition: transform 0.35s var(--ease-spring), box-shadow 0.35s;
    position: relative;
    z-index: 1;
}
.skill-item:hover .skill-icon {
    transform: rotate(5deg) scale(1.12);
    box-shadow: 0 6px 18px rgba(0,0,0,0.35);
}

.custom-icon {
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: -0.5px;
}

.skill-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    position: relative;
    z-index: 1;
    min-width: 0;
}

.skill-name {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.skill-level {
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 500;
}

/* Technology-specific icon colors */
.skill-item[data-skill="python"] .skill-icon      { background: linear-gradient(135deg, #3776ab, #ffd343); }
.skill-item[data-skill="javascript"] .skill-icon   { background: linear-gradient(135deg, #f7df1e, #323330); }
.skill-item[data-skill="react"] .skill-icon        { background: linear-gradient(135deg, #61dafb, #20232a); }
.skill-item[data-skill="nodejs"] .skill-icon       { background: linear-gradient(135deg, #339933, #68a063); }
.skill-item[data-skill="java"] .skill-icon         { background: linear-gradient(135deg, #ed8b00, #5382a1); }
.skill-item[data-skill="html5"] .skill-icon        { background: linear-gradient(135deg, #e34c26, #f06529); }
.skill-item[data-skill="css3"] .skill-icon         { background: linear-gradient(135deg, #1572b6, #33a9dc); }
.skill-item[data-skill="php"] .skill-icon          { background: linear-gradient(135deg, #777bb4, #8892bf); }
.skill-item[data-skill="mysql"] .skill-icon        { background: linear-gradient(135deg, #4479a1, #00758f); }
.skill-item[data-skill="mongodb"] .skill-icon      { background: linear-gradient(135deg, #47a248, #4db33d); }
.skill-item[data-skill="docker"] .skill-icon       { background: linear-gradient(135deg, #2496ed, #0db7ed); }
.skill-item[data-skill="git"] .skill-icon          { background: linear-gradient(135deg, #f05032, #f14e32); }
.skill-item[data-skill="github"] .skill-icon       { background: linear-gradient(135deg, #444, #24292e); }
.skill-item[data-skill="aws"] .skill-icon          { background: linear-gradient(135deg, #ff9900, #232f3e); }
.skill-item[data-skill="figma"] .skill-icon        { background: linear-gradient(135deg, #f24e1e, #a259ff); }
.skill-item[data-skill="bootstrap"] .skill-icon    { background: linear-gradient(135deg, #7952b3, #563d7c); }
.skill-item[data-skill="typescript"] .skill-icon   { background: linear-gradient(135deg, #3178c6, #235a97); }
.skill-item[data-skill="firebase"] .skill-icon     { background: linear-gradient(135deg, #ffca28, #ff8f00); }
.skill-item[data-skill="postgresql"] .skill-icon   { background: linear-gradient(135deg, #336791, #205375); }
.skill-item[data-skill="c"] .skill-icon            { background: linear-gradient(135deg, #00599c, #004482); }
.skill-item[data-skill="csharp"] .skill-icon       { background: linear-gradient(135deg, #239120, #68217a); }
.skill-item[data-skill="cpp"] .skill-icon          { background: linear-gradient(135deg, #00599c, #004482); }
.skill-item[data-skill="sql"] .skill-icon          { background: linear-gradient(135deg, #336791, #4479a1); }
.skill-item[data-skill="flutter"] .skill-icon      { background: linear-gradient(135deg, #02569b, #075eab); }
.skill-item[data-skill="express"] .skill-icon      { background: linear-gradient(135deg, #333, #68a063); }
.skill-item[data-skill="flask"] .skill-icon        { background: linear-gradient(135deg, #333, #666); }
.skill-item[data-skill="django"] .skill-icon       { background: linear-gradient(135deg, #092e20, #0c4b33); }
.skill-item[data-skill="fastapi"] .skill-icon      { background: linear-gradient(135deg, #009688, #00695c); }
.skill-item[data-skill="dotnet"] .skill-icon       { background: linear-gradient(135deg, #512bd4, #239120); }
.skill-item[data-skill="tensorflow"] .skill-icon   { background: linear-gradient(135deg, #ff6f00, #ff8f00); }
.skill-item[data-skill="sklearn"] .skill-icon      { background: linear-gradient(135deg, #f7931e, #3499cd); }
.skill-item[data-skill="pandas"] .skill-icon       { background: linear-gradient(135deg, #150458, #e70488); }
.skill-item[data-skill="numpy"] .skill-icon        { background: linear-gradient(135deg, #013243, #4dabcf); }
.skill-item[data-skill="matplotlib"] .skill-icon   { background: linear-gradient(135deg, #11557c, #306998); }
.skill-item[data-skill="powerbi"] .skill-icon      { background: linear-gradient(135deg, #f2c811, #e97627); }
.skill-item[data-skill="azure"] .skill-icon        { background: linear-gradient(135deg, #0078d4, #0063b1); }
.skill-item[data-skill="jira"] .skill-icon         { background: linear-gradient(135deg, #0052cc, #2684ff); }
.skill-item[data-skill="wordpress"] .skill-icon    { background: linear-gradient(135deg, #21759b, #464646); }
.skill-item[data-skill="msproject"] .skill-icon    { background: linear-gradient(135deg, #31752f, #107c10); }

/* ==========================================================
   PROJECTS SECTION
   ========================================================== */
.projects {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s, border-color 0.4s;
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    z-index: 2;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow-hover);
    border-color: var(--glass-border-hover);
}

.project-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(139,92,246,0.2), rgba(236,72,153,0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-placeholder {
    font-size: 4rem;
    opacity: 0.85;
    transition: transform 0.5s var(--ease-spring);
}
.project-card:hover .project-placeholder {
    transform: scale(1.2) rotate(-5deg);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s var(--ease-out);
}
.project-card:hover .project-overlay { opacity: 1; }

.project-links { display: flex; gap: 0.75rem; }
.project-links .btn { padding: 0.65rem 1.25rem; font-size: 0.85rem; }

.project-content { padding: 1.5rem; }

.project-content h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    transition: color 0.3s;
}
.project-card:hover .project-content h3 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.project-content p {
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.project-tech span {
    background: rgba(79, 141, 255, 0.14);
    color: #c8d9ff;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(129, 166, 255, 0.35);
    transition: background 0.3s, border-color 0.3s;
}
.project-tech span:hover {
    background: rgba(123, 97, 255, 0.2);
    border-color: rgba(169, 153, 255, 0.45);
}

/* ==========================================================
   EXPERIENCE / TIMELINE
   ========================================================== */
.experience {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 3rem auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-blue), var(--accent-purple), var(--accent-pink));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-left: 75px;
}

.timeline-marker {
    position: absolute;
    left: 21px; top: 6px;
    width: 20px; height: 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    border: 4px solid var(--color-base);
    z-index: 2;
    box-shadow: 0 0 12px rgba(59,130,246,0.4), 0 0 24px rgba(139,92,246,0.2);
    transition: box-shadow 0.3s, transform 0.3s;
}
.timeline-item:hover .timeline-marker {
    box-shadow: 0 0 18px rgba(59,130,246,0.6), 0 0 36px rgba(139,92,246,0.3);
    transform: scale(1.2);
}

.timeline-content {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: relative;
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.35s;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 14px; left: -8px;
    width: 0; height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 8px solid var(--glass-border);
}

.timeline-item:hover .timeline-content {
    transform: translateX(6px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.timeline-content h3 { color: var(--text-primary); font-size: 1.15rem; font-weight: 700; margin-bottom: 0.4rem; }
.timeline-content h4 { color: var(--accent-blue); font-size: 0.95rem; font-weight: 600; margin-bottom: 0.85rem; }
.timeline-content p  { color: rgba(255,255,255,0.7); line-height: 1.7; font-size: 0.92rem; }

/* ==========================================================
   GITHUB PROFILE SECTION
   ========================================================== */
.github-profile {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.github-content {
    max-width: 1000px;
    margin: 0 auto;
}

.github-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    text-align: center;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.35s;
}
.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.stat-card h3 {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.35rem;
    line-height: 1.2;
}

.stat-card p { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; }

/* GitHub iframe browser mockup */
.github-iframe-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    margin-bottom: 3rem;
}

.iframe-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.5rem;
    background: rgba(255,255,255,0.04);
    border-bottom: 1px solid var(--glass-border);
    gap: 1rem;
}

.iframe-controls { display: flex; gap: 0.5rem; flex-shrink: 0; }

.control-dot { width: 12px; height: 12px; border-radius: 50%; }
.control-dot.red    { background: #ff5f57; }
.control-dot.yellow { background: #ffbd2e; }
.control-dot.green  { background: #28ca42; }

.iframe-title {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.iframe-actions { flex-shrink: 0; }
.iframe-actions .btn { padding: 0.5rem 1rem; font-size: 0.8rem; }

.iframe-wrapper { position: relative; height: 600px; }
.iframe-wrapper iframe { width: 100%; height: 100%; border: none; }

.iframe-overlay {
    position: absolute;
    inset: 0;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.4s;
    pointer-events: none;
}

.loading-message { text-align: center; color: var(--text-primary); }
.loading-message i {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading-spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255,255,255,0.08);
    border-top: 3px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

/* GitHub highlights */
.github-highlights h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.75rem;
    text-align: center;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}
.activity-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.activity-item i  { color: var(--accent-blue); font-size: 1.2rem; margin-top: 0.15rem; flex-shrink: 0; }
.activity-item h4 { color: var(--text-primary); font-weight: 600; font-size: 0.95rem; margin-bottom: 0.35rem; }
.activity-item p  { color: var(--text-muted); font-size: 0.85rem; line-height: 1.55; }

/* ==========================================================
   CERTIFICATIONS SECTION
   ========================================================== */
.certifications {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.cert-category {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s, border-color 0.4s;
    position: relative;
    overflow: hidden;
}

.cert-category::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.cert-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.cert-category h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cert-items { display: grid; gap: 0.85rem; }

.cert-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    transition: all 0.3s var(--ease-out);
}
.cert-item:hover {
    background: rgba(255,255,255,0.07);
    transform: translateX(6px);
    border-color: rgba(59,130,246,0.25);
    box-shadow: 0 0 15px rgba(59,130,246,0.08);
}

.cert-item h4 { color: var(--text-primary); font-weight: 600; font-size: 0.95rem; margin-bottom: 0.35rem; }
.cert-item p   { color: var(--text-muted); font-size: 0.85rem; line-height: 1.5; }

/* ==========================================================
   SOFT SKILLS SECTION
   ========================================================== */
.soft-skills {
    padding: 4rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.soft-skills-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.soft-skills-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.soft-skills-container h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.soft-skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.85rem;
    max-width: 850px;
    margin: 0 auto;
}

.soft-skill-item {
    background: rgba(79, 141, 255, 0.14);
    color: #d9e5ff;
    padding: 0.7rem 1rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid rgba(129, 166, 255, 0.34);
    transition: all 0.3s var(--ease-out);
    cursor: default;
}
.soft-skill-item:hover {
    background: rgba(123, 97, 255, 0.22);
    transform: translateY(-3px);
    box-shadow: 0 10px 26px rgba(79,141,255,0.25);
    border-color: rgba(169, 153, 255, 0.5);
}

/* ==========================================================
   REFERENCES SECTION
   ========================================================== */
.references {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reference-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.35s;
    position: relative;
    overflow: hidden;
}

.reference-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.reference-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
    border-color: var(--glass-border-hover);
}

.reference-content h3 { color: var(--text-primary); font-size: 1.15rem; font-weight: 700; margin-bottom: 0.35rem; }
.reference-content h4 { color: var(--accent-blue); font-size: 0.95rem; font-weight: 600; margin-bottom: 1.25rem; }

.reference-contact { display: grid; gap: 0.65rem; }
.reference-contact p { color: var(--text-muted); display: flex; align-items: center; gap: 0.75rem; font-size: 0.9rem; }
.reference-contact i { color: var(--accent-blue); width: 16px; text-align: center; flex-shrink: 0; }

.reference-note {
    background: rgba(59,130,246,0.08);
    border: 1px solid rgba(59,130,246,0.18);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-top: 2rem;
    text-align: center;
}
.reference-note p {
    color: var(--accent-blue);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.92rem;
}

/* ==========================================================
   CONTACT SECTION
   ========================================================== */
.contact {
    padding: 6rem 2rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
}

.contact-info h3 { color: var(--text-primary); font-size: 1.4rem; font-weight: 700; margin-bottom: 1rem; }

.contact-info > p {
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.contact-items { display: grid; gap: 0.75rem; }

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: inherit;
    transition: all 0.3s var(--ease-out);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}
.contact-item:hover {
    background: var(--glass-bg-hover);
    transform: translateX(6px);
    border-color: rgba(59,130,246,0.3);
    box-shadow: 0 0 20px rgba(59,130,246,0.1);
}

.contact-item i  { color: var(--accent-blue); font-size: 1.15rem; width: 22px; text-align: center; flex-shrink: 0; }
.contact-item h4 { color: var(--text-primary); font-weight: 600; font-size: 0.9rem; margin-bottom: 0.15rem; }
.contact-item p  { color: var(--text-muted); font-size: 0.85rem; }

/* Contact form */
.contact-form {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.form-group { margin-bottom: 1.25rem; }

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1.15rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(255,255,255,0.07);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15), 0 0 20px rgba(59,130,246,0.1);
}

.form-group textarea { resize: vertical; min-height: 130px; }

.contact-form .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 1rem;
    font-size: 1rem;
}

/* ==========================================================
   FOOTER
   ========================================================== */
.footer {
    background: var(--color-base);
    border-top: 1px solid var(--glass-border);
    padding: 3rem 0 1.25rem;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 2rem;
}

.footer-info h3 { color: var(--text-primary); font-weight: 700; margin-bottom: 0.4rem; font-size: 1.05rem; }
.footer-info p   { color: var(--text-muted); font-size: 0.9rem; }

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
}
.footer-links a { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; transition: color 0.3s; }
.footer-links a:hover { color: var(--accent-blue); }

.footer-social { display: flex; gap: 0.75rem; justify-content: flex-end; }

.social-link {
    width: 40px; height: 40px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1rem;
    transition: all 0.3s var(--ease-out);
}
.social-link:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(59,130,246,0.35);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
}
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }
.footer-admin-link {
    color: rgba(255,255,255,0.15);
    font-size: 0.7rem;
    text-decoration: none;
    margin-top: 0.5rem;
    display: inline-block;
}

/* ==========================================================
   BACK TO TOP
   ========================================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem; right: 2rem;
    width: 48px; height: 48px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: opacity 0.35s, visibility 0.35s, transform 0.35s var(--ease-out), box-shadow 0.35s;
    font-size: 1rem;
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59,130,246,0.4);
}

/* ==========================================================
   CV PREVIEW MODAL
   ========================================================== */
.cv-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.cv-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.cv-modal {
    background: var(--card-bg, #1a1a2e);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    width: 90%;
    max-width: 900px;
    height: 85vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.cv-modal-overlay.active .cv-modal {
    transform: scale(1);
}

.cv-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.cv-modal-title {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.cv-modal-close {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #ffffff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
    line-height: 1;
}

.cv-modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.cv-modal-close:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.cv-modal-body {
    flex: 1;
    padding: 0;
    overflow: hidden;
}

.cv-modal-body iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #ffffff;
}

/* ==========================================================
   LOADING SCREEN (compatible with inline styles)
   ========================================================== */
.loading-screen .loading-spinner {
    border-top-color: var(--accent-blue);
}

/* ==========================================================
   ANIMATIONS
   ========================================================== */
@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================
   ACCESSIBILITY
   ========================================================== */
.btn:focus-visible,
.nav-link:focus-visible,
.social-link:focus-visible,
.contact-item:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 3px;
}

.form-group input:focus-visible,
.form-group textarea:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 1px;
}

/* ==========================================================
   RESPONSIVE — Tablet (1024px)
   ========================================================== */
@media (max-width: 1024px) {
    .skills-grid { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
    .github-stats { grid-template-columns: repeat(2, 1fr); }
    .activity-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; text-align: center; gap: 1.5rem; }
    .footer-social { justify-content: center; }
}

/* ==========================================================
   RESPONSIVE — Mobile (768px)
   ========================================================== */
@media (max-width: 768px) {
    :root { --nav-height: 64px; }
    .container { padding: 0 1.25rem; }

    /* Mobile nav */
    .nav-toggle { display: flex; }

    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 280px; height: 100vh;
        background: rgba(10,10,15,0.97);
        backdrop-filter: blur(30px);
        -webkit-backdrop-filter: blur(30px);
        flex-direction: column;
        align-items: flex-start;
        padding: calc(var(--nav-height) + 2rem) 2rem 2rem;
        gap: 0;
        border-left: 1px solid var(--glass-border);
        transition: right 0.4s var(--ease-out);
        z-index: 999;
        overflow-y: auto;
    }
    .nav-menu.active { right: 0; }

    .nav-link {
        font-size: 1rem;
        padding: 0.85rem 0;
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .nav-link::after { bottom: 0; }

    /* Hero */
    .hero {
        padding: calc(var(--nav-height) + 1.5rem) 1.25rem 2.5rem;
        min-height: 100svh;
    }
    .hero-title, .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
    .hero-subtitle { font-size: 1rem; }
    .hero-description { font-size: 0.9rem; }
    .hero-buttons { flex-direction: column; align-items: center; gap: 0.75rem; }
    .hero-buttons .btn { width: 100%; max-width: 280px; justify-content: center; }

    /* About */
    .about { padding: 4rem 1.25rem; }
    .about-content { grid-template-columns: 1fr; gap: 2.5rem; text-align: center; }
    .about-text { order: 2; }
    .about-image { order: 1; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .stat h3, .stat .counter { font-size: 1.7rem; }
    .image-container { max-width: 250px; }

    /* Skills */
    .skills { padding: 4rem 1.25rem; }
    .skills-grid { grid-template-columns: 1fr; }

    /* Projects */
    .projects { padding: 4rem 1.25rem; }
    .projects-grid { grid-template-columns: 1fr; }

    /* Experience */
    .experience { padding: 4rem 1.25rem; }
    .timeline::before { left: 16px; }
    .timeline-item { padding-left: 50px; }
    .timeline-marker { left: 7px; width: 18px; height: 18px; }
    .timeline-content { padding: 1.25rem; }
    .timeline-content::before { left: -7px; border-right-width: 7px; }

    /* GitHub */
    .github-profile { padding: 4rem 1.25rem; }
    .github-stats { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .stat-card h3 { font-size: 2rem; }
    .iframe-wrapper { height: 400px; }
    .iframe-header { flex-wrap: wrap; gap: 0.5rem; padding: 0.75rem 1rem; }
    .iframe-title { font-size: 0.8rem; order: 2; flex-basis: 100%; }
    .iframe-actions { order: 1; }
    .activity-grid { grid-template-columns: 1fr; }

    /* Certifications */
    .certifications { padding: 4rem 1.25rem; }
    .certifications-grid { grid-template-columns: 1fr; }

    /* Soft Skills */
    .soft-skills { padding: 3rem 1.25rem; }
    .soft-skills-container { padding: 2rem 1.25rem; }
    .soft-skills-list { grid-template-columns: repeat(2, 1fr); }

    /* References */
    .references { padding: 4rem 1.25rem; }
    .references-grid { grid-template-columns: 1fr; }

    /* Contact */
    .contact { padding: 4rem 1.25rem; }
    .contact-content { grid-template-columns: 1fr; gap: 2.5rem; }

    /* Footer */
    .footer { padding: 2rem 0 1rem; }
    .footer-content { grid-template-columns: 1fr; text-align: center; gap: 1.25rem; }
    .footer-social { justify-content: center; }
}

/* ==========================================================
   RESPONSIVE — Small Mobile (480px)
   ========================================================== */
@media (max-width: 480px) {
    .about-stats { grid-template-columns: 1fr; gap: 1rem; }
    .soft-skills-list { grid-template-columns: 1fr; }
    .hero-buttons .btn { max-width: 100%; }
    .github-stats { grid-template-columns: 1fr; }
    .section-header h2 { font-size: 1.75rem; }
    .back-to-top { bottom: 1.25rem; right: 1.25rem; width: 42px; height: 42px; }
}

/* ==========================================================
   WHATSAPP FLOATING BUTTON
   ========================================================== */
.whatsapp-float {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 1000;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    transition: transform 0.3s var(--ease-out, ease), box-shadow 0.3s var(--ease-out, ease);
    text-decoration: none;
    cursor: pointer;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.55);
}

@media (max-width: 768px) {
    .whatsapp-float {
        bottom: 1.5rem;
        left: 1.5rem;
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

/* ==========================================================
   PRINT STYLES
   ========================================================== */
@media print {
    .navbar, .back-to-top, .loading-screen, .hero-background,
    .scroll-indicator, .three-bg-canvas, .whatsapp-float { display: none !important; }
    body { background: #fff; color: #222; }
    * { backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
}

/* ==========================================================
   DESIGNS GALLERY PAGE
   ========================================================== */

/* --- Designs Hero --- */
.designs-hero {
    min-height: 40vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + 3rem) 1.5rem 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.designs-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(139,92,246,0.18) 0%, transparent 70%);
    pointer-events: none;
}

.designs-hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.designs-hero-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 2rem;
}

/* --- Filter Bar --- */
.designs-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
    padding: 1.5rem 1.5rem 0;
}

.filter-btn {
    padding: 0.45rem 1.1rem;
    border-radius: 50px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s var(--ease-out);
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 16px rgba(139,92,246,0.3);
}

/* --- Gallery Grid --- */
.designs-gallery {
    padding: 3rem 1.5rem 5rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.75rem;
    max-width: var(--container-max);
    margin: 2rem auto 0;
}

/* --- Design Card --- */
.design-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease-out), border-color 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.design-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow-hover);
    border-color: var(--glass-border-hover);
}

.design-card-image {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-surface-2);
}

.design-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s var(--ease-out);
}

.design-card:hover .design-card-image img {
    transform: scale(1.05);
}

.design-card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-surface-2), var(--color-surface));
    gap: 0.75rem;
    font-size: 2.5rem;
}

.design-card-placeholder span {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.design-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,10,15,0.85) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 1.25rem;
}

.design-card:hover .design-card-overlay {
    opacity: 1;
}

.design-card-overlay-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.2s;
}

.design-card-overlay-btn:hover {
    background: rgba(255,255,255,0.25);
}

.design-card-body {
    padding: 1.25rem 1.25rem 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.design-card-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.design-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.design-card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.design-card-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-top: 0.25rem;
}

.design-tool-tag {
    font-size: 0.72rem;
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    background: rgba(139,92,246,0.12);
    border: 1px solid rgba(139,92,246,0.25);
    color: var(--accent-purple);
    font-weight: 500;
}

/* --- Empty State --- */
.designs-empty {
    text-align: center;
    padding: 4rem 1.5rem;
    color: var(--text-muted);
    grid-column: 1 / -1;
}

.designs-empty i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    opacity: 0.4;
}

.designs-empty h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* --- Lightbox --- */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.92);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    backdrop-filter: blur(8px);
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-container {
    max-width: 900px;
    width: 100%;
    background: var(--color-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    transform: scale(0.95);
    transition: transform 0.3s var(--ease-spring);
}

.lightbox-overlay.active .lightbox-container {
    transform: scale(1);
}

.lightbox-image-wrap {
    position: relative;
    background: var(--color-surface-2);
    max-height: 56vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.lightbox-placeholder {
    font-size: 5rem;
    padding: 3rem;
}

.lightbox-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15);
    color: #fff;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
    z-index: 2;
}

.lightbox-close:hover { background: rgba(236,72,153,0.5); }

.lightbox-info {
    padding: 1.5rem 1.75rem 1.75rem;
    overflow-y: auto;
}

.lightbox-category {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.4rem;
}

.lightbox-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.lightbox-desc {
    font-size: 0.925rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.lightbox-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .gallery-grid { grid-template-columns: 1fr; }
    .lightbox-container { border-radius: var(--radius-md); }
    .lightbox-info { padding: 1.25rem; }
}