/* ============================================
   ronbofan.com — Premium Design System v3
   Dark-first · Glass-morphism · 2026 aesthetic
   Inspired by Linear, Vercel, Raycast, Stripe
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Dark theme is default */
    --bg-base: #06080f;
    --bg-surface: #0c1021;
    --bg-elevated: #111730;
    --bg-card: rgba(17, 23, 48, 0.6);
    --bg-card-hover: rgba(22, 30, 58, 0.75);
    --bg-glass: rgba(17, 23, 48, 0.45);

    --text-primary: #f0f2f8;
    --text-secondary: #a0aec0;
    --text-muted: #5a6a85;
    --text-heading: #ffffff;

    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-lighter: #a5b4fc;
    --accent-cyan: #22d3ee;
    --accent-glow: rgba(99, 102, 241, 0.35);
    --accent-glow-subtle: rgba(99, 102, 241, 0.12);
    --gradient-accent: linear-gradient(135deg, #6366f1, #818cf8, #22d3ee);
    --gradient-accent-r: linear-gradient(135deg, #22d3ee, #6366f1);
    --gradient-text: linear-gradient(135deg, #e0e7ff 0%, #a5b4fc 40%, #818cf8 70%, #22d3ee 100%);

    --border: rgba(148, 163, 184, 0.08);
    --border-light: rgba(148, 163, 184, 0.05);
    --border-accent: rgba(99, 102, 241, 0.2);
    --border-glow: rgba(99, 102, 241, 0.35);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
    --shadow-glow-lg: 0 0 80px rgba(99, 102, 241, 0.2);

    --radius: 16px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --radius-pill: 9999px;

    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition: 0.3s var(--ease);
    --transition-slow: 0.5s var(--ease);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --max-width: 1100px;
    --nav-height: 72px;
    --section-gap: clamp(4rem, 8vw, 8rem);
}

/* Light theme */
[data-theme="light"] {
    --bg-base: #f8f9fc;
    --bg-surface: #ffffff;
    --bg-elevated: #f1f3f8;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --bg-glass: rgba(255, 255, 255, 0.65);

    --text-primary: #1a1d2e;
    --text-secondary: #4a5568;
    --text-muted: #8896ab;
    --text-heading: #0f1629;

    --accent: #4f46e5;
    --accent-light: #6366f1;
    --accent-lighter: #818cf8;
    --accent-cyan: #0891b2;
    --accent-glow: rgba(79, 70, 229, 0.25);
    --accent-glow-subtle: rgba(79, 70, 229, 0.08);
    --gradient-accent: linear-gradient(135deg, #4f46e5, #6366f1, #0891b2);
    --gradient-accent-r: linear-gradient(135deg, #0891b2, #4f46e5);
    --gradient-text: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4f46e5 70%, #0891b2 100%);

    --border: rgba(15, 23, 42, 0.08);
    --border-light: rgba(15, 23, 42, 0.04);
    --border-accent: rgba(79, 70, 229, 0.18);
    --border-glow: rgba(79, 70, 229, 0.3);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.1);
    --shadow-glow-lg: 0 0 80px rgba(79, 70, 229, 0.12);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 2rem);
}

body {
    font-family: var(--font);
    font-weight: 400;
    line-height: 1.75;
    color: var(--text-primary);
    background-color: var(--bg-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

img { max-width: 100%; height: auto; display: block; }

a {
    color: var(--accent-light);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover { color: var(--accent-lighter); }

::selection {
    background: var(--accent);
    color: #ffffff;
}

/* --- Reading Progress Bar --- */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--gradient-accent);
    z-index: 1001;
    transition: width 0.1s linear;
}

/* --- Navigation --- */
.site-nav {
    background: transparent;
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--nav-height);
    border-bottom: 1px solid transparent;
    transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-nav.scrolled {
    background: var(--bg-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom-color: var(--border);
}

.site-nav .logo {
    color: var(--text-heading);
    font-weight: 700;
    font-size: 1.15rem;
    text-decoration: none;
    letter-spacing: -0.04em;
    flex-shrink: 0;
    transition: opacity var(--transition);
}

.site-nav .logo:hover { opacity: 0.7; }

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    order: 3;
}

.site-nav .nav-links {
    display: flex;
    gap: 0.25rem;
    list-style: none;
    align-items: center;
}

.site-nav .nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 450;
    transition: all var(--transition);
    padding: 0.45rem 0.8rem;
    border-radius: var(--radius-pill);
    position: relative;
    letter-spacing: -0.01em;
}

.site-nav .nav-links a:hover {
    color: var(--text-primary);
    background: var(--accent-glow-subtle);
}

.site-nav .nav-links a.active {
    color: var(--text-heading);
    background: var(--accent-glow-subtle);
    border: 1px solid var(--border-accent);
}

/* Theme toggle */
.theme-toggle {
    background: var(--accent-glow-subtle);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--accent-glow);
    border-color: var(--border-accent);
    transform: rotate(15deg) scale(1.08);
}

/* Mobile nav */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: opacity var(--transition);
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

.nav-toggle:hover { opacity: 0.7; }

@media (max-width: 900px) {
    .nav-toggle { display: flex; }
    .site-nav .nav-links {
        display: none;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-base);
        padding: 6rem 2rem 3rem;
        gap: 0.25rem;
        z-index: 999;
        animation: mobileNavIn 0.35s var(--ease);
        overflow-y: auto;
    }
    .site-nav .nav-links.open { display: flex; }
    .site-nav .nav-links a {
        padding: 1rem 1.25rem;
        width: 100%;
        border-radius: var(--radius-sm);
        font-size: 1.1rem;
        font-weight: 500;
        color: var(--text-secondary);
    }
    .site-nav .nav-links a:hover,
    .site-nav .nav-links a.active {
        color: var(--text-heading);
        background: var(--accent-glow-subtle);
    }
}

@keyframes mobileNavIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --- Breadcrumb --- */
.breadcrumb {
    padding: 0.75rem 2rem;
    font-size: 0.82rem;
    color: var(--text-muted);
    max-width: var(--max-width);
    margin: 0 auto;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb span { margin: 0 0.5rem; opacity: 0.4; }
.breadcrumb ol { list-style: none; display: flex; gap: 0.5rem; }
.breadcrumb ol li::before { content: '/'; margin-right: 0.5rem; opacity: 0.3; }
.breadcrumb ol li:first-child::before { content: none; }

/* --- Hero (Home) --- */
.hero {
    background: var(--bg-base);
    color: var(--text-heading);
    padding: clamp(5rem, 12vw, 9rem) 2rem clamp(5rem, 10vw, 8rem);
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%; left: -20%; right: -20%; bottom: -30%;
    background:
        radial-gradient(ellipse 60% 50% at 25% 30%, rgba(99,102,241,0.15), transparent 70%),
        radial-gradient(ellipse 50% 40% at 75% 25%, rgba(34,211,238,0.1), transparent 70%),
        radial-gradient(ellipse 70% 50% at 50% 80%, rgba(129,140,248,0.08), transparent 70%),
        radial-gradient(circle at 60% 50%, rgba(99,102,241,0.06), transparent 50%);
    animation: meshDrift 25s ease-in-out infinite alternate;
    pointer-events: none;
}

[data-theme="light"] .hero::before {
    background:
        radial-gradient(ellipse 60% 50% at 25% 30%, rgba(79,70,229,0.08), transparent 70%),
        radial-gradient(ellipse 50% 40% at 75% 25%, rgba(8,145,178,0.06), transparent 70%),
        radial-gradient(ellipse 70% 50% at 50% 80%, rgba(99,102,241,0.05), transparent 70%);
}

@keyframes meshDrift {
    0% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(2%, -1%) rotate(0.5deg); }
    66% { transform: translate(-1%, 2%) rotate(-0.3deg); }
    100% { transform: translate(1%, -2%) rotate(0.2deg); }
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, var(--bg-base), transparent);
    pointer-events: none;
    transition: background var(--transition);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.hero-content > * {
    animation: heroFadeUp 0.8s var(--ease) both;
}

.hero-content > *:nth-child(1) { animation-delay: 0s; }
.hero-content > *:nth-child(2) { animation-delay: 0.08s; }
.hero-content > *:nth-child(3) { animation-delay: 0.16s; }
.hero-content > *:nth-child(4) { animation-delay: 0.24s; }
.hero-content > *:nth-child(5) { animation-delay: 0.32s; }

@keyframes heroFadeUp {
    from { opacity: 0; transform: translateY(28px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Hero profile photo */
.hero-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 2.5rem;
    border: 2px solid rgba(99,102,241,0.3);
    box-shadow:
        0 0 0 1px rgba(99,102,241,0.15),
        0 0 60px rgba(99,102,241,0.2),
        0 0 120px rgba(99,102,241,0.1);
    animation: photoGlow 4s ease-in-out infinite alternate, photoReveal 0.8s var(--ease) both;
    transition: transform var(--transition);
}

.hero-photo:hover {
    transform: scale(1.04);
}

@keyframes photoGlow {
    from {
        box-shadow:
            0 0 0 1px rgba(99,102,241,0.15),
            0 0 60px rgba(99,102,241,0.2),
            0 0 120px rgba(99,102,241,0.1);
    }
    to {
        box-shadow:
            0 0 0 1px rgba(99,102,241,0.25),
            0 0 80px rgba(99,102,241,0.3),
            0 0 140px rgba(34,211,238,0.12);
    }
}

@keyframes photoReveal {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.05em;
    line-height: 1.05;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero .tagline {
    font-size: 0.95rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
    font-weight: 350;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.hero-badge, .hero-badges .badge {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    color: var(--text-secondary);
    padding: 0.45rem 1.1rem;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
    letter-spacing: -0.01em;
}

.hero-badge:hover, .hero-badges .badge:hover {
    background: var(--accent-glow-subtle);
    border-color: var(--border-accent);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* --- Page Header (Inner Pages) --- */
.page-header {
    background: var(--bg-base);
    color: var(--text-heading);
    padding: clamp(3rem, 6vw, 5rem) 2rem clamp(3rem, 5vw, 4.5rem);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%; left: -30%; right: -30%; bottom: -50%;
    background:
        radial-gradient(ellipse 50% 40% at 30% 40%, rgba(99,102,241,0.1), transparent 70%),
        radial-gradient(ellipse 40% 35% at 70% 30%, rgba(34,211,238,0.06), transparent 70%);
    pointer-events: none;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--bg-base), transparent);
    pointer-events: none;
    transition: background var(--transition);
}

.page-header h1 {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.04em;
    animation: heroFadeUp 0.6s var(--ease) both;
    position: relative;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p,
.page-header .subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto;
    animation: heroFadeUp 0.6s var(--ease) 0.1s both;
    position: relative;
    letter-spacing: -0.01em;
    font-weight: 350;
}

.page-header .reading-time {
    margin-top: 1rem;
    font-size: 0.82rem;
    color: var(--text-muted);
    animation: heroFadeUp 0.6s var(--ease) 0.2s both;
    position: relative;
}

/* --- Article Header --- */
.article-header {
    background: var(--bg-base);
    color: var(--text-heading);
    padding: clamp(3rem, 6vw, 5rem) 2rem clamp(3rem, 5vw, 4.5rem);
    position: relative;
    overflow: hidden;
}

.article-header::before {
    content: '';
    position: absolute;
    top: -50%; left: -30%; right: -30%; bottom: -50%;
    background: radial-gradient(ellipse 50% 40% at 30% 40%, rgba(99,102,241,0.1), transparent 70%);
    pointer-events: none;
}

.article-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--bg-base), transparent);
    pointer-events: none;
    transition: background var(--transition);
}

.article-header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    animation: heroFadeUp 0.6s var(--ease);
    position: relative;
}

.article-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 1.25rem;
    letter-spacing: -0.04em;
    line-height: 1.15;
    max-width: 800px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 0.88rem;
    color: var(--text-muted);
    align-items: center;
}

.article-meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

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

.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--section-gap) 2rem;
}

/* --- Sections & Cards --- */
section, .card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: background var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    position: relative;
}

section:hover, .card:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

/* Content sections without card style */
.content-section {
    padding: clamp(2rem, 4vw, 3rem) 0;
    margin-bottom: 1.5rem;
    background: transparent;
    border: none;
    backdrop-filter: none;
}

.content-section:hover {
    border-color: transparent;
    box-shadow: none;
}

/* Fade in on scroll */
.fade-in {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation for child cards */
.fade-in.visible .skill-card,
.fade-in.visible .stat-card,
.fade-in.visible .contact-card {
    animation: cardReveal 0.5s var(--ease) both;
}

.fade-in.visible .skill-card:nth-child(1),
.fade-in.visible .stat-card:nth-child(1),
.fade-in.visible .contact-card:nth-child(1) { animation-delay: 0s; }
.fade-in.visible .skill-card:nth-child(2),
.fade-in.visible .stat-card:nth-child(2),
.fade-in.visible .contact-card:nth-child(2) { animation-delay: 0.06s; }
.fade-in.visible .skill-card:nth-child(3),
.fade-in.visible .stat-card:nth-child(3),
.fade-in.visible .contact-card:nth-child(3) { animation-delay: 0.12s; }
.fade-in.visible .skill-card:nth-child(4),
.fade-in.visible .stat-card:nth-child(4) { animation-delay: 0.18s; }
.fade-in.visible .skill-card:nth-child(5) { animation-delay: 0.24s; }
.fade-in.visible .skill-card:nth-child(6) { animation-delay: 0.3s; }

@keyframes cardReveal {
    from { opacity: 0; transform: translateY(20px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* --- Typography --- */
h2 {
    color: var(--text-heading);
    font-size: clamp(1.35rem, 2.5vw, 1.65rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    line-height: 1.2;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: 1px;
    margin-top: 0.6rem;
}

h3 {
    color: var(--text-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

h4 {
    color: var(--text-heading);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

p { margin-bottom: 1rem; color: var(--text-secondary); font-weight: 350; }
p:last-child { margin-bottom: 0; }

strong { color: var(--text-primary); font-weight: 600; }

/* --- Experience / Timeline --- */
.timeline {
    position: relative;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, var(--accent), var(--border) 70%, transparent);
}

.timeline-item {
    position: relative;
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.timeline-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-2.5rem - 5px);
    top: 2rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--bg-base), 0 0 12px var(--accent-glow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.timeline-item:hover::before {
    transform: scale(1.3);
    box-shadow: 0 0 0 3px var(--bg-base), 0 0 20px var(--accent-glow);
}

.experience-item {
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.experience-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.experience-item:last-child, .timeline-item:last-child { margin-bottom: 0; }

.meta {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.meta-tag {
    background: var(--accent-glow-subtle);
    padding: 0.2rem 0.7rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    color: var(--accent-light);
    border: 1px solid var(--border-accent);
    font-weight: 500;
}

.company {
    color: var(--accent-light);
    font-weight: 500;
    font-size: 0.95rem;
}

.related-links {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Skills Grid --- */
.skills-grid, .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.skill-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 1px;
    background: conic-gradient(from 0deg, var(--accent), var(--accent-cyan), var(--accent), var(--accent-cyan), var(--accent));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.5s var(--ease);
    animation: borderRotate 6s linear infinite;
}

@keyframes borderRotate {
    to { transform: rotate(360deg); }
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.skill-card:hover::before {
    opacity: 0.6;
}

.skill-card strong {
    display: block;
    color: var(--text-heading);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    letter-spacing: -0.01em;
}

.skill-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

.proficiency-pct {
    float: right;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-light);
    font-variant-numeric: tabular-nums;
}

/* Proficiency bar */
.proficiency-bar {
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    margin-top: 0.75rem;
    overflow: hidden;
}

.proficiency-fill {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: 2px;
    transition: width 1.2s var(--ease);
    width: 0%;
    box-shadow: 0 0 8px var(--accent-glow);
}

/* --- Project Cards --- */
.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    margin-bottom: 1.25rem;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-accent);
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.project-card:last-child { margin-bottom: 0; }
.project-card h3 { color: var(--text-heading); margin-bottom: 0.75rem; }

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1.25rem;
}

.tech-tag {
    background: var(--accent-glow-subtle);
    color: var(--accent-light);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-accent);
    transition: all var(--transition);
    letter-spacing: -0.01em;
}

.tech-tag:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.project-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.metric { text-align: center; }

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-light);
    display: block;
    letter-spacing: -0.02em;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* --- Article Cards --- */
.article-card {
    padding: clamp(1.5rem, 3vw, 2rem);
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.article-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.article-card:hover::after { opacity: 1; }

.article-card h3 { font-size: 1.1rem; }
.article-card h3 a { color: var(--text-heading); text-decoration: none; transition: color var(--transition); }
.article-card h3 a:hover { color: var(--accent-light); }

.article-card .date {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.article-card .article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1rem;
}

.article-tag,
.article-tags span {
    background: var(--accent-glow-subtle);
    color: var(--text-muted);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-pill);
    font-size: 0.7rem;
    border: 1px solid var(--border);
    font-weight: 500;
}

/* --- Article Content --- */
.article-content {
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text-secondary);
}

.article-content h2 {
    margin-top: 3.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    font-size: 1.4rem;
}

.article-content h3 {
    margin-top: 2.5rem;
    margin-bottom: 0.75rem;
}

.article-content ul, .article-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.article-content blockquote {
    border-left: 2px solid var(--accent);
    padding: 1.25rem 1.75rem;
    margin: 2.5rem 0;
    background: var(--accent-glow-subtle);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.article-content pre {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 1.5rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    font-size: 0.88rem;
    line-height: 1.6;
}

.article-content code {
    background: var(--bg-elevated);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.88em;
    color: var(--accent-lighter);
}

.article-content pre code {
    background: none;
    padding: 0;
    color: var(--text-secondary);
}

/* Key takeaways box */
.key-takeaways {
    background: var(--accent-glow-subtle);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 2rem 0;
}

.key-takeaways h3 { color: var(--accent-light); margin-bottom: 1rem; }

/* Table of contents */
.toc {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem 2rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(8px);
}

.toc h3 { font-size: 0.85rem; margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; }
.toc ol { margin-left: 1.25rem; }
.toc li { margin-bottom: 0.35rem; font-size: 0.92rem; color: var(--text-secondary); }
.toc a { color: var(--accent-light); text-decoration: none; }
.toc a:hover { color: var(--accent-lighter); text-decoration: underline; }

/* Related articles */
.related-articles {
    margin-top: 3.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border);
}

.related-articles h3 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.related-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    backdrop-filter: blur(8px);
}

.related-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
}

.related-card a { text-decoration: none; }
.related-card h4 { color: var(--text-heading); margin-bottom: 0.5rem; font-size: 1rem; }
.related-card p { font-size: 0.85rem; color: var(--text-muted); }

/* --- Links List --- */
.links-list { list-style: none; padding: 0; }

.links-list li {
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--border);
    transition: transform var(--transition);
}

.links-list li:hover { transform: translateX(6px); }
.links-list li:last-child { border-bottom: none; }

.links-list a {
    color: var(--accent-light);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
}

.links-list a:hover { color: var(--accent-lighter); }

.link-desc {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* --- CTA Button --- */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: #ffffff;
    padding: 0.7rem 1.75rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all var(--transition);
    margin-top: 1.25rem;
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
}

.cta-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition);
}

.cta-btn:hover {
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.cta-btn:hover::before { opacity: 1; }

.cta-btn-outline,
.cta-btn-secondary {
    background: transparent;
    color: var(--accent-light);
    border: 1px solid var(--border-accent);
}

.cta-btn-outline:hover,
.cta-btn-secondary:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: #ffffff;
    padding: 0.7rem 1.75rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.88rem;
    transition: all var(--transition);
    margin-top: 1.25rem;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* --- Stat Cards --- */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-card, .stat {
    text-align: center;
    padding: clamp(1.5rem, 3vw, 2rem) 1.25rem;
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover, .stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
}

.stat-number {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1;
    display: block;
    margin-bottom: 0.4rem;
    letter-spacing: -0.03em;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: -0.01em;
}

/* --- Certification / Resource Cards --- */
.cert-card, .resource-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.cert-card::after, .resource-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-accent);
}

.cert-card:hover, .resource-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.cert-card h3, .resource-card h3 { margin-bottom: 0.5rem; }
.cert-card .cert-issuer { color: var(--text-muted); font-size: 0.88rem; }
.cert-card .cert-date { color: var(--text-muted); font-size: 0.82rem; }

/* --- Speaking Card --- */
.speaking-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.speaking-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.speaking-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.speaking-card:hover::after { opacity: 1; }

.speaking-card h3 { margin-bottom: 0.5rem; }
.speaking-card .speaking-meta {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* --- Blockquote --- */
blockquote {
    border-left: 2px solid var(--accent);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    background: var(--accent-glow-subtle);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.75;
}

/* --- Lists --- */
ul, ol { margin-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.5rem; color: var(--text-secondary); }

/* --- Tag Cloud --- */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    background: var(--accent-glow-subtle);
    color: var(--text-muted);
    padding: 0.3rem 0.9rem;
    border-radius: var(--radius-pill);
    font-size: 0.78rem;
    font-weight: 500;
    border: 1px solid var(--border);
    transition: all var(--transition);
    letter-spacing: -0.01em;
}

.tag:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* --- Contact Grid --- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.contact-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: clamp(1.5rem, 3vw, 2.25rem) clamp(1.5rem, 3vw, 2rem);
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
}

.contact-card h3 { margin-bottom: 0.5rem; }
.contact-card a { font-weight: 600; font-size: 1rem; }
.contact-card p { color: var(--text-muted); font-size: 0.88rem; }

/* --- About page profile photo --- */
.about-photo-wrap {
    float: right;
    margin: 0 0 2rem 2.5rem;
    position: relative;
}

.about-photo {
    width: 280px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border);
}

.about-photo:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl), var(--shadow-glow-lg);
}

/* --- Footer --- */
footer {
    background: var(--bg-surface);
    color: var(--text-muted);
    margin-top: var(--section-gap);
    padding: 0;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--border);
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-accent);
    opacity: 0.3;
}

/* Subtle grid pattern */
footer::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-light) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
    pointer-events: none;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: clamp(3rem, 6vw, 5rem) 2rem 2rem;
    position: relative;
    z-index: 1;
}

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

.footer-col h4 {
    color: var(--text-heading);
    font-size: 0.82rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.footer-col p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    margin-bottom: 0.75rem;
    transition: all var(--transition);
    padding-left: 0;
}

.footer-col a:hover {
    color: var(--accent-light);
    padding-left: 4px;
}

/* Old footer format fallback */
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    padding: 2rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.88rem;
    transition: color var(--transition);
}

.footer-links a:hover { color: var(--accent-light); }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 1.75rem;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-secondary);
    transition: color var(--transition);
}

.footer-bottom a:hover { color: var(--accent-light); }

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent);
    color: #ffffff;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    box-shadow: 0 4px 20px var(--accent-glow);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px var(--accent-glow);
}

/* --- 404 Page --- */
.error-page {
    text-align: center;
    padding: 6rem 2rem;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    backdrop-filter: none;
}

.error-page:hover {
    box-shadow: none;
    border-color: transparent;
}

.error-page h1 {
    font-size: clamp(5rem, 15vw, 8rem);
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 1rem;
    letter-spacing: -0.05em;
}

.error-page h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-heading);
}

.error-page h2::after { display: none; }

.error-page p {
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 2rem;
}

.error-links {
    margin-top: 2rem;
}

.error-links p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.error-links ul {
    list-style: none;
    margin: 1rem 0 0;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.error-links a {
    color: var(--accent-light);
    font-weight: 500;
}

/* --- Two Column Layout --- */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .two-col { grid-template-columns: 1fr; }
}

/* --- Highlight Box --- */
.highlight-box {
    background: var(--accent-glow-subtle);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 1.5rem 0;
}

/* --- Icon Row --- */
.icon-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.icon-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-accent);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .hero::before { animation: none; }
    .hero-photo { animation: none; }
    .fade-in { opacity: 1; transform: none; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero { min-height: auto; padding: clamp(4rem, 10vw, 6rem) 1.5rem clamp(3rem, 8vw, 5rem); }
    .hero-photo { width: 120px; height: 120px; }
    .page-header { padding: clamp(2.5rem, 5vw, 3.5rem) 1.5rem clamp(2rem, 4vw, 3rem); }
    .article-header { padding: clamp(2.5rem, 5vw, 3.5rem) 1.5rem clamp(2rem, 4vw, 3rem); }
    section, .card { padding: clamp(1.25rem, 3vw, 1.75rem); }
    .container, .container-narrow { padding: clamp(2rem, 5vw, 4rem) 1.25rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .skills-grid, .card-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .about-photo-wrap {
        float: none;
        margin: 0 auto 2rem;
        text-align: center;
    }
    .about-photo {
        width: 220px;
        margin: 0 auto;
    }
    .timeline { padding-left: 2rem; }
    .timeline-item::before { left: calc(-2rem - 5px); }
}

@media (max-width: 480px) {
    .hero-photo { width: 100px; height: 100px; }
    .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    section, .card { padding: 1.25rem; }
    .hero-badges { justify-content: center; }
    .article-meta { flex-direction: column; gap: 0.5rem; }
    .footer-content { padding: 2.5rem 1.5rem 1.5rem; }
    .cta-group { flex-direction: column; }
}

/* --- Print Styles --- */
@media print {
    .site-nav, .back-to-top, .theme-toggle, .nav-toggle, .reading-progress { display: none !important; }
    .hero, .page-header, .article-header { padding: 1rem 0 !important; }
    .hero::before, .hero::after, .page-header::before, .page-header::after, .article-header::before, .article-header::after { display: none; }
    section, .card { box-shadow: none !important; border: 1px solid #ddd; backdrop-filter: none; }
    body { color: #000; background: #fff; }
    footer { background: #f5f5f5 !important; color: #333 !important; }
    h1, h2, h3, h4, .hero h1, .page-header h1, .article-header h1 {
        -webkit-text-fill-color: initial;
        background: none;
        color: #000;
    }
    .stat-number {
        -webkit-text-fill-color: initial;
        background: none;
        color: #4f46e5;
    }
}