/* ============================================
   DESIGN SYSTEM — Hoài Nguyễn Profile
   Premium Dark Glassmorphism Theme
   ============================================ */

/* --- CSS Variables --- */
:root {
    /* Colors */
    --bg-primary: #030712;
    --bg-secondary: #0a0f1e;
    --bg-surface: #111827;
    --bg-card: rgba(17, 24, 39, 0.6);
    --bg-card-hover: rgba(30, 41, 59, 0.7);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-teal: #14b8a6;
    --accent-teal-light: #2dd4bf;
    --accent-cyan: #22d3ee;
    --accent-violet: #8b5cf6;
    --accent-pink: #ec4899;

    --gradient-primary: linear-gradient(135deg, #22d3ee 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-teal-violet: linear-gradient(135deg, #14b8a6, #8b5cf6);
    --gradient-card: linear-gradient(180deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.3) 100%);

    --glass-bg: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 16px;

    /* Typography */
    --font-primary: 'Outfit', 'Inter', -apple-system, system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --section-padding: 120px 0;
    --container-width: 1200px;
    --container-padding: 0 24px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* Selection */
::selection {
    background: rgba(34, 211, 238, 0.3);
    color: #fff;
}

/* --- Particle Canvas --- */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.6;
}

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

/* --- Navigation --- */
.nav-glass {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(3, 7, 18, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-base);
}

.nav-glass.scrolled {
    background: rgba(3, 7, 18, 0.9);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal-violet);
    border-radius: 10px;
    font-weight: 800;
    font-size: 1rem;
    color: #fff;
}

.logo-text {
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link-cta {
    background: var(--gradient-teal-violet);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    margin-left: 8px;
}

.nav-link-cta:hover {
    background: linear-gradient(135deg, #0d9488, #7c3aed);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(20, 184, 166, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('assets/images/hero-bg.png') center/cover no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.hero-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(to right, rgba(31, 41, 55, 0.3) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(31, 41, 55, 0.3) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: linear-gradient(to bottom, transparent, 10%, rgba(0,0,0,0.5), 90%, transparent);
    -webkit-mask-image: linear-gradient(to bottom, transparent, 10%, rgba(0,0,0,0.5), 90%, transparent);
    z-index: 0;
}

.hero-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: 0;
    animation: float-orb 15s ease-in-out infinite;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.15) 0%, transparent 70%);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
    bottom: -10%;
    left: -10%;
    animation-delay: -5s;
}

.hero-orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.08) 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float-orb {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -30px) rotate(2deg); }
    50% { transform: translate(-10px, -50px) rotate(-1deg); }
    75% { transform: translate(-20px, -20px) rotate(1deg); }
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

/* Hero Text */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(20, 184, 166, 0.1);
    border: 1px solid rgba(20, 184, 166, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-teal-light);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-teal);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-greeting {
    display: block;
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 8px;
    letter-spacing: 0;
}

.hero-name {
    display: block;
}

.name-highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
}

.text-gradient-inline {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: 28px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-teal);
    font-family: var(--font-mono);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--glass-border), transparent);
}

/* Hero CTA */
.hero-cta {
    display: flex;
    gap: 16px;
    align-items: center;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--gradient-teal-violet);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(20, 184, 166, 0.35);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* Hero Portrait */
.hero-portrait {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.portrait-ring {
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    border: 1px solid rgba(34, 211, 238, 0.15);
    animation: spin-slow 30s linear infinite;
}

.portrait-ring::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    width: 8px;
    height: 8px;
    background: var(--accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--accent-cyan);
}

.portrait-ring-2 {
    width: 470px;
    height: 470px;
    border-color: rgba(139, 92, 246, 0.1);
    animation-direction: reverse;
    animation-duration: 40s;
}

.portrait-ring-2::before {
    background: var(--accent-violet);
    box-shadow: 0 0 12px var(--accent-violet);
}

@keyframes spin-slow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.portrait-glow {
    position: absolute;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.portrait-img {
    width: 340px;
    height: 340px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(34, 211, 238, 0.2);
    position: relative;
    z-index: 2;
    animation: float-portrait 8s ease-in-out infinite;
}

@keyframes float-portrait {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.portrait-badge {
    position: absolute;
    bottom: 30px;
    right: -10px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-cyan);
    z-index: 3;
    animation: float-portrait 6s ease-in-out infinite;
    animation-delay: -3s;
}

.badge-icon {
    font-size: 1.1rem;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 2;
}

.scroll-arrow {
    width: 20px;
    height: 30px;
    border: 2px solid rgba(148, 163, 184, 0.3);
    border-radius: 10px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    width: 4px;
    height: 8px;
    background: var(--accent-teal);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 14px; opacity: 0.3; }
}

/* --- Section Base --- */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-compact {
    padding: 60px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-teal);
    margin-bottom: 16px;
    font-weight: 500;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-lead {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.text-link {
    color: var(--accent-teal-light);
    text-decoration: underline;
    text-decoration-color: rgba(45, 212, 191, 0.3);
    text-underline-offset: 3px;
    transition: var(--transition-fast);
}

.text-link:hover {
    color: var(--accent-cyan);
    text-decoration-color: var(--accent-cyan);
}

.about-roles {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.role-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.role-chip:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: rgba(34, 211, 238, 0.2);
}

.role-icon {
    font-size: 1rem;
}

/* About Cards */
.about-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.info-card {
    padding: 24px;
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: var(--transition-base);
}

.info-card:hover {
    border-color: rgba(34, 211, 238, 0.15);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.card-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent-cyan);
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.card-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* --- Expertise Section --- */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.expertise-card {
    padding: 32px;
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-base);
}

.expertise-card:hover {
    border-color: rgba(34, 211, 238, 0.15);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.expertise-card:hover::before {
    opacity: 1;
}

.expertise-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: rgba(34, 211, 238, 0.08);
    color: var(--accent-cyan);
    margin-bottom: 20px;
    transition: var(--transition-base);
}

.expertise-card:hover .expertise-icon {
    background: rgba(34, 211, 238, 0.15);
    transform: scale(1.05);
}

.expertise-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.expertise-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.expertise-tags span {
    padding: 4px 10px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--accent-violet);
    font-weight: 500;
}

/* --- Bizino Showcase --- */
.bizino-showcase {
    max-width: 800px;
    margin: 0 auto;
}

.bizino-hero-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.bizino-card-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.08), rgba(139, 92, 246, 0.08));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

.bizino-card-content {
    position: relative;
    padding: 48px;
    z-index: 1;
}

.bizino-logo-area {
    text-align: center;
    margin-bottom: 40px;
}

.bizino-logo {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.bizino-logo-text {
    color: var(--text-primary);
}

.bizino-logo-ai {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bizino-tagline {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.bizino-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 36px;
}

.bizino-feature {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 16px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: var(--transition-fast);
}

.bizino-feature:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(34, 211, 238, 0.1);
}

.feature-icon-wrap {
    width: 40px;
    height: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(34, 211, 238, 0.1);
    color: var(--accent-cyan);
}

.bizino-feature h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.bizino-feature p {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Bizino Metrics */
.bizino-metrics {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 36px;
    padding: 24px 0;
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: var(--gradient-teal-violet);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    display: block;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

/* Bizino CTA */
.bizino-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    background: var(--gradient-teal-violet);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-full);
    width: fit-content;
    margin: 0 auto;
    transition: var(--transition-base);
}

.bizino-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(20, 184, 166, 0.35);
}

/* Partners */
.bizino-partners {
    text-align: center;
    margin-top: 40px;
}

.partners-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 16px;
}

.partners-list {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.partner-badge {
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* --- Timeline --- */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-teal), var(--accent-violet), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

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

.timeline-dot {
    position: absolute;
    left: -34px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--accent-teal);
    z-index: 2;
    transition: var(--transition-base);
}

.timeline-dot.active {
    background: var(--accent-teal);
    box-shadow: 0 0 12px rgba(20, 184, 166, 0.5);
}

.timeline-content {
    padding: 24px;
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.timeline-item:hover .timeline-content {
    border-color: rgba(34, 211, 238, 0.15);
    transform: translateX(4px);
}

.timeline-year {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-teal);
    padding: 3px 10px;
    background: rgba(20, 184, 166, 0.1);
    border-radius: var(--radius-full);
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Philosophy --- */
.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.philosophy-card {
    padding: 32px;
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.philosophy-card:hover {
    border-color: rgba(34, 211, 238, 0.15);
    transform: translateY(-3px);
}

.philosophy-card-featured {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.06), rgba(139, 92, 246, 0.06));
    border-color: rgba(34, 211, 238, 0.15);
}

.philosophy-quote {
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: -10px;
}

.philosophy-card blockquote {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.8;
    font-style: italic;
    color: var(--text-primary);
    max-width: 700px;
    margin: 0 auto 16px;
}

.philosophy-card cite {
    display: block;
    font-size: 0.9rem;
    color: var(--accent-teal);
    font-style: normal;
    font-weight: 600;
}

.philosophy-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.philosophy-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.philosophy-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Media Banner --- */
.media-banner {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 24px 40px;
    background: var(--gradient-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
}

.media-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    white-space: nowrap;
    font-weight: 500;
}

.media-logos {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    flex: 1;
    justify-content: center;
}

.media-logo {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    opacity: 0.7;
    transition: var(--transition-fast);
    cursor: default;
}

.media-logo:hover {
    opacity: 1;
    color: var(--accent-cyan);
}

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    padding: 32px 24px;
    background: var(--gradient-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.contact-card:hover {
    border-color: rgba(34, 211, 238, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.contact-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    transition: var(--transition-base);
}

.facebook-icon {
    background: rgba(24, 119, 242, 0.1);
    color: #1877f2;
}

.zalo-icon {
    background: rgba(0, 133, 255, 0.1);
    color: #0085ff;
}

.email-icon {
    background: rgba(234, 67, 53, 0.1);
    color: #ea4335;
}

.bizino-icon-contact {
    background: rgba(20, 184, 166, 0.1);
    color: var(--accent-teal);
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 700;
}

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

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--glass-border);
    background: var(--bg-primary);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.footer-logo {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal-violet);
    border-radius: 8px;
    font-weight: 800;
    font-size: 0.85rem;
    color: #fff;
}

.footer-text {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.footer-text a {
    color: var(--accent-teal-light);
    transition: var(--transition-fast);
}

.footer-text a:hover {
    color: var(--accent-cyan);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   ANIMATIONS
   ============================================ */

/* Scroll-triggered animations */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate="fade-left"] {
    transform: translateX(40px);
}

[data-animate].animated {
    opacity: 1;
    transform: translate(0, 0);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    :root {
        --section-padding: 80px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-portrait {
        order: -1;
    }

    .portrait-img {
        width: 280px;
        height: 280px;
    }

    .portrait-ring { width: 340px; height: 340px; }
    .portrait-ring-2 { width: 380px; height: 380px; }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .bizino-features {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2.2rem;
    }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(3, 7, 18, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .nav-link-cta {
        text-align: center;
        margin: 8px 0 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 16px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 12px;
    }

    .portrait-img {
        width: 220px;
        height: 220px;
    }

    .portrait-ring { width: 280px; height: 280px; }
    .portrait-ring-2 { width: 320px; height: 320px; }

    .portrait-badge {
        right: auto;
        bottom: 10px;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .bizino-card-content {
        padding: 28px;
    }

    .bizino-metrics {
        gap: 24px;
    }

    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-card blockquote {
        font-size: 1.05rem;
    }

    .media-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        padding: 24px;
    }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline {
        padding-left: 32px;
    }

    .timeline-dot {
        left: -26px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .bizino-metrics {
        flex-direction: column;
        gap: 16px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }
}