/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-200: #bfdbfe;
    --blue-300: #93c5fd;
    --blue-400: #60a5fa;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-900: #1e3a8a;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --green: #22c55e;
    --orange: #f59e0b;
    --red: #ef4444;
    --purple: #8b5cf6;
    --cyan: #06b6d4;

    --bg: #f8fafc;
    --bg-alt: #ffffff;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 24px;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--blue-600);
    letter-spacing: -0.02em;
}

.nav-logo-icon {
    width: 28px;
    height: 28px;
    color: var(--blue-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--blue-600);
}

.nav-github {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--gray-900);
    color: #fff !important;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.2s;
}

.nav-github:hover {
    background: var(--gray-700);
    color: #fff !important;
    transform: translateY(-1px);
}

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

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 60%);
    pointer-events: none;
}

.hero-container {
    position: relative;
    max-width: 800px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--blue-50);
    border: 1px solid var(--blue-200);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--blue-700);
    margin-bottom: 28px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--blue-500);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
    font-size: clamp(3rem, 7vw, 5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.04em;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.hero-title-accent {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    position: relative;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
    color: #fff;
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.3), 0 1px 3px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.4), 0 2px 6px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: var(--bg-alt);
    color: var(--text);
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    border-color: var(--blue-300);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
}

.btn-badge {
    padding: 2px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
    font-weight: 700;
}

/* ===== HERO STATS ===== */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--blue-600);
    letter-spacing: -0.03em;
}

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

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ===== SECTION BASE ===== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--gray-900);
}

.text-accent {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 560px;
    margin: 16px auto 0;
    line-height: 1.7;
}

/* ===== FEATURES ===== */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.06);
    border-color: var(--blue-200);
}

.feature-card-large {
    grid-column: span 3;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto auto;
    gap: 0 24px;
    padding: 40px;
    background: linear-gradient(135deg, var(--blue-50), var(--bg-alt));
    border-color: var(--blue-200);
}

.feature-card-large .feature-icon {
    grid-row: 1 / 3;
    align-self: start;
}

.feature-card-large .feature-tags {
    grid-column: 1 / -1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon-blue { background: var(--blue-100); color: var(--blue-600); }
.feature-icon-red { background: #fee2e2; color: var(--red); }
.feature-icon-green { background: #dcfce7; color: var(--green); }
.feature-icon-purple { background: #ede9fe; color: var(--purple); }
.feature-icon-orange { background: #fef3c7; color: var(--orange); }
.feature-icon-cyan { background: #cffafe; color: var(--cyan); }

.feature-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.feature-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.65;
}

.feature-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.tag {
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--blue-100);
    color: var(--blue-700);
    font-size: 0.78rem;
    font-weight: 600;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    padding: 100px 0;
    background: var(--bg-alt);
}

.steps-timeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.step-card {
    flex: 1;
    min-width: 220px;
    max-width: 280px;
    padding: 32px 24px;
    text-align: center;
}

.step-number {
    font-size: 3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--blue-200), var(--blue-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 16px;
}

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

.step-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.step-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--blue-200), var(--blue-400));
    border-radius: 999px;
    flex-shrink: 0;
}

/* ===== CATEGORIES ===== */
.categories {
    padding: 100px 0;
}

.categories-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.category-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.25s;
}

.category-chip:hover {
    border-color: var(--blue-300);
    background: var(--blue-50);
    transform: translateY(-2px);
}

.category-emoji {
    font-size: 1.15rem;
}

.risk-levels {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}

.risk-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.25s;
}

.risk-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.04);
}

.risk-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 4px;
}

.risk-dot-low { background: var(--green); }
.risk-dot-medium { background: var(--orange); }
.risk-dot-high { background: var(--red); }

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

.risk-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== TECH STACK ===== */
.tech-stack {
    padding: 100px 0;
    background: var(--bg-alt);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.tech-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 32px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all 0.25s;
}

.tech-card:hover {
    border-color: var(--blue-300);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.04);
}

.tech-icon {
    font-size: 2rem;
    margin-bottom: 4px;
}

.tech-name {
    font-size: 0.95rem;
    font-weight: 700;
}

.tech-role {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== CTA ===== */
.cta {
    padding: 100px 0;
}

.cta-card {
    position: relative;
    background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
    border-radius: 24px;
    padding: 80px 40px;
    text-align: center;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 500px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.cta .btn-primary {
    background: #fff;
    color: var(--blue-700);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.cta .btn-primary:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.cta-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}

/* ===== FOOTER ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 48px 24px 24px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 32px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--blue-600);
    margin-bottom: 8px;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 28px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--blue-600);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-card-large {
        grid-column: span 2;
    }

    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links a:not(.nav-github) {
        display: none;
    }

    .hero {
        padding: 120px 20px 60px;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

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

    .feature-card-large {
        grid-column: span 1;
        display: block;
    }

    .steps-timeline {
        flex-direction: column;
    }

    .step-connector {
        width: 2px;
        height: 40px;
        background: linear-gradient(180deg, var(--blue-200), var(--blue-400));
    }

    .risk-levels {
        grid-template-columns: 1fr;
    }

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

    .cta-card {
        padding: 60px 24px;
    }

    .footer-container {
        flex-direction: column;
        gap: 24px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .cta-actions {
        flex-direction: column;
    }

    .cta .btn {
        width: 100%;
    }
}

/* ===== GSAP ANIMATION HELPERS ===== */
.gs-hidden {
    opacity: 0;
    transform: translateY(30px);
}

.gs-hidden-left {
    opacity: 0;
    transform: translateX(-40px);
}

.gs-hidden-right {
    opacity: 0;
    transform: translateX(40px);
}

.gs-hidden-scale {
    opacity: 0;
    transform: scale(0.9);
}