/* ===================================
   AI Guy — Design System
   =================================== */

:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #0f0f18;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    --text-primary: #f0f0f5;
    --text-secondary: #8a8a9a;
    --text-muted: #5a5a6a;

    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);

    --cyan: #22d3ee;
    --cyan-glow: rgba(34, 211, 238, 0.1);

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --section-padding: clamp(4rem, 8vw, 8rem);
    --container-max: 1100px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===================================
   Reset & Base
   =================================== */

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    transition: background 0.4s var(--ease-out), backdrop-filter 0.4s var(--ease-out);
}

.nav.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    display: flex;
    align-items: baseline;
    gap: 0;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

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

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

.logo-domain {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.85rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color 0.2s;
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-cta {
    padding: 0.5rem 1.25rem !important;
    background: var(--accent-gradient);
    color: white !important;
    border-radius: 8px;
    font-weight: 600 !important;
    transition: transform 0.2s var(--ease-spring), box-shadow 0.2s !important;
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

/* ===================================
   Hero
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    transform: scale(1.05);
    animation: heroZoom 20s var(--ease-out) infinite alternate;
}

@keyframes heroZoom {
    from { transform: scale(1.05); }
    to { transform: scale(1.12); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(10, 10, 15, 0.3) 0%, rgba(10, 10, 15, 0.7) 50%, var(--bg-primary) 100%),
        radial-gradient(ellipse at 30% 50%, var(--accent-glow) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-light);
    letter-spacing: 0.03em;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
    animation: fadeUp 0.8s var(--ease-out) both;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    animation: fadeUp 0.8s var(--ease-out) 0.1s both;
}

.hero-sub {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 540px;
    line-height: 1.7;
    margin-bottom: 2rem;
    animation: fadeUp 0.8s var(--ease-out) 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    animation: fadeUp 0.8s var(--ease-out) 0.3s both;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    animation: fadeUp 0.8s var(--ease-out) 0.4s both;
}

.stat-num {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all 0.25s var(--ease-spring);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.3);
}

.btn-ghost {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

/* ===================================
   Sections
   =================================== */

.section {
    padding: var(--section-padding) 2rem;
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    margin-bottom: 3rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--accent-glow);
    border-radius: 4px;
}

.section-header h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* ===================================
   Services Grid
   =================================== */

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.service-card {
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s var(--ease-out);
}

.service-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: 12px;
    color: var(--accent-light);
    margin-bottom: 1.25rem;
}

.service-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.service-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   Timeline
   =================================== */

.timeline {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
    padding-left: 1.5rem;
}

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

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 6px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--accent);
    z-index: 1;
    transition: background 0.2s, box-shadow 0.2s;
}

.timeline-item:hover .timeline-marker {
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0.25rem 0 0.375rem;
}

.timeline-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===================================
   Credentials
   =================================== */

.credentials {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.credential {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.credential-label {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

/* ===================================
   Work Grid
   =================================== */

.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.work-card {
    display: block;
    padding: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s var(--ease-out);
}

.work-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.work-type {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
    padding: 0.2rem 0.6rem;
    background: var(--cyan-glow);
    border-radius: 4px;
}

.work-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.work-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.work-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-light);
    transition: color 0.2s;
}

.work-card:hover .work-link {
    color: var(--text-primary);
}

/* ===================================
   Contact
   =================================== */

.contact-container {
    text-align: center;
    max-width: 600px;
}

.contact-container .section-header {
    text-align: center;
}

.contact-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ===================================
   Footer
   =================================== */

.footer {
    padding: 2rem;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    font-weight: 700;
    font-size: 1rem;
}

.footer-legal {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===================================
   Animations
   =================================== */

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

/* Scroll-triggered fade-in */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

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

/* ===================================
   Responsive
   =================================== */

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

    .hero-stats {
        gap: 1.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .credentials {
        flex-direction: column;
    }

    .footer-inner {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
}