/* ==========================================================================
   detayz — Applied AI Engineering Studio
   Master Design System & Stylesheet
   ========================================================================== */

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

:root {
    --bg-void: #03050a;
    --bg-surface: rgba(10, 16, 30, 0.72);
    --bg-surface-hover: rgba(14, 23, 44, 0.88);
    
    --white: #ffffff;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --cyan: #38bdf8;
    --cyan-dim: rgba(56, 189, 248, 0.14);
    --cyan-glow: rgba(56, 189, 248, 0.35);
    --blue: #2563eb;
    
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-card: rgba(56, 189, 248, 0.14);
    --border-card-hover: rgba(56, 189, 248, 0.4);
    
    --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-serif: 'Newsreader', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: rgba(56, 189, 248, 0.3) var(--bg-void);
}

body {
    background-color: var(--bg-void);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: rgba(56, 189, 248, 0.25);
    color: var(--white);
}

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

/* ── Three.js Canvas ── */
#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* ── Container Layout ── */
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    position: relative;
    z-index: 2;
    padding: 8rem 0;
}

/* ── Navigation ── */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.35s var(--ease-out);
}

#navbar.scrolled {
    padding: 1rem 0;
    background: rgba(3, 5, 10, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    cursor: pointer;
}

.brand-spark {
    color: var(--cyan);
    font-size: 1.15rem;
    line-height: 1;
    filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.8));
    animation: sparkBreathe 3s ease-in-out infinite;
}

@keyframes sparkBreathe {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.18); filter: drop-shadow(0 0 16px rgba(56, 189, 248, 1)); }
}

.brand-name {
    font-family: var(--font-sans);
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--white);
    text-transform: lowercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.25rem;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    transition: color 0.25s ease;
}

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

.nav-cta-btn {
    padding: 0.45rem 1.1rem;
    border: 1px solid var(--border-card);
    border-radius: 6px;
    color: var(--cyan) !important;
    background: rgba(56, 189, 248, 0.06);
    transition: all 0.25s ease !important;
}

.nav-cta-btn:hover {
    background: rgba(56, 189, 248, 0.16) !important;
    border-color: var(--cyan) !important;
    box-shadow: 0 0 20px rgba(56, 189, 248, 0.25);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: 0.3s ease;
}

/* ── Hero Section (Split Layout) ── */
#hero {
    min-height: min(100vh, 980px);
    display: flex;
    align-items: center;
    padding: 7rem 0 3rem;
    position: relative;
    z-index: 2;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
    width: 100%;
}

.hero-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

/* Status Badge */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--cyan);
    padding: 0.4rem 1.1rem;
    border-radius: 100px;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.25);
    margin-bottom: 2rem;
}

.badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
    animation: dotPulse 2s infinite ease-in-out;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

/* Clean Wordmark */
.hero-title {
    font-family: var(--font-sans);
    font-size: clamp(3.75rem, 8.5vw, 6.75rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 0.95;
    color: var(--white);
    text-transform: lowercase;
    margin-bottom: 1.25rem;
}

.hero-dot {
    color: var(--cyan);
    filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.9));
}

.hero-tagline {
    font-size: clamp(1.2rem, 2.5vw, 1.65rem);
    font-weight: 500;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 1.25rem;
    max-width: 580px;
}

.serif-accent {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--white);
}

.hero-description {
    font-size: 0.98rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 540px;
    margin-bottom: 2.5rem;
}

/* CTA Buttons */
.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
}

.btn-primary {
    background: var(--white);
    color: var(--bg-void);
    border: 1px solid var(--white);
}

.btn-primary:hover {
    background: #e2e8f0;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: var(--white);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    border-color: var(--cyan);
    background: rgba(56, 189, 248, 0.08);
    transform: translateY(-2px);
}

/* Metrics Bar */
.hero-metrics {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    padding: 0.9rem 1.6rem;
    border-radius: 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(12px);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-num {
    font-family: var(--font-sans);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.02em;
}

.metric-lbl {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    text-transform: uppercase;
}

.metric-divider {
    width: 1px;
    height: 24px;
    background: var(--border-subtle);
}

/* Right: 3D Area Container */
.hero-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 480px;
    position: relative;
    pointer-events: none;
}

.hero-3d-hint {
    position: absolute;
    bottom: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    opacity: 0.75;
}

.hint-icon {
    color: var(--cyan);
}

/* ── Section Headers ── */
.section-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--cyan);
    margin-bottom: 1.25rem;
}

h2 {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.18;
    color: var(--white);
}

.highlight {
    color: var(--cyan);
}

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

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    max-width: 620px;
}

/* ── About Section ── */
.about-split {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 4rem;
    align-items: start;
    margin-bottom: 4rem;
}

.about-title h2 {
    font-size: clamp(1.8rem, 3.2vw, 2.5rem);
    line-height: 1.25;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.about-text .lead {
    color: var(--text-primary);
    font-size: 1.08rem;
}

.cinematic-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-card);
    background: var(--bg-surface);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
}

.cinematic-img {
    width: 100%;
    height: auto;
    aspect-ratio: 21 / 9;
    object-fit: cover;
    display: block;
    filter: brightness(0.92) contrast(1.05);
    transition: transform 0.6s var(--ease-out);
}

.cinematic-wrapper:hover .cinematic-img {
    transform: scale(1.02);
}

.cinematic-meta {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.25rem 2rem;
    background: linear-gradient(180deg, transparent, rgba(3, 5, 10, 0.95));
    display: flex;
    justify-content: flex-end;
}

.cinematic-meta span {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    color: var(--cyan);
    opacity: 0.85;
}

/* ── Capabilities Cards ── */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
}

.feature-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    padding: 2.75rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: all 0.35s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.feature-card:hover {
    background: var(--bg-surface-hover);
    border-color: var(--border-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(56, 189, 248, 0.1);
}

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

.card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.75rem;
}

.card-num {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 2.2rem;
    color: rgba(56, 189, 248, 0.35);
    line-height: 1;
}

.card-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: var(--cyan);
    background: var(--cyan-dim);
    border: 1px solid rgba(56, 189, 248, 0.25);
    padding: 0.25rem 0.65rem;
    border-radius: 4px;
}

.feature-card h3 {
    font-family: var(--font-sans);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--white);
    margin-bottom: 0.85rem;
}

.feature-card p {
    font-size: 0.94rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.75rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.card-tags span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.35rem 0.8rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    transition: all 0.25s ease;
}

.feature-card:hover .card-tags span {
    border-color: rgba(56, 189, 248, 0.25);
    color: var(--text-primary);
}

/* ── Pipeline Grid ── */
.pipeline-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.pipeline-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 2.2rem 1.6rem;
    backdrop-filter: blur(12px);
    transition: all 0.3s ease;
}

.pipeline-item:hover {
    border-color: var(--border-card);
    transform: translateY(-2px);
}

.pipeline-step {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 1rem;
}

.pipeline-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.75rem;
    line-height: 1.35;
}

.pipeline-item p {
    font-size: 0.86rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ── Stack Cloud ── */
.stack-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    max-width: 960px;
}

.stack-pill {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 500;
    padding: 0.65rem 1.35rem;
    border-radius: 100px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: default;
    transition: all 0.25s var(--ease-out);
    backdrop-filter: blur(8px);
}

.stack-pill:hover {
    border-color: var(--cyan);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.15);
}

.stack-pill.highlight {
    border-color: var(--border-card);
    color: var(--text-primary);
}

/* ── Contact Section ── */
.contact-card {
    text-align: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: 24px;
    padding: 4.5rem 3rem;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 40px rgba(56, 189, 248, 0.08);
    max-width: 820px;
    margin: 0 auto;
}

.contact-kicker {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--cyan);
    margin-bottom: 1.25rem;
}

.contact-sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 1rem auto 2.5rem;
}

.contact-action {
    margin-bottom: 2rem;
}

.contact-email-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1.5rem 3.5rem;
    border: 1px solid var(--border-card-hover);
    border-radius: 14px;
    background: rgba(56, 189, 248, 0.06);
    transition: all 0.35s var(--ease-out);
}

.contact-email-btn:hover {
    border-color: var(--cyan);
    background: rgba(56, 189, 248, 0.14);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(56, 189, 248, 0.2);
}

.email-subtext {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.email-address {
    font-family: var(--font-sans);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.02em;
}

.contact-footer-note {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
}

.status-pulse-small {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
}

/* ── Footer ── */
footer {
    position: relative;
    z-index: 2;
    padding: 2.5rem 0;
    border-top: 1px solid var(--border-subtle);
    background: rgba(3, 5, 10, 0.8);
    backdrop-filter: blur(12px);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
}

.footer-spark {
    color: var(--cyan);
}

.footer-name {
    color: var(--white);
}

.footer-desc {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-muted);
}

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

/* ── Responsive Queries ── */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 3rem;
    }
    
    .hero-left {
        align-items: center;
        text-align: center;
    }
    
    .hero-right {
        min-height: 380px;
    }
    
    .about-split {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .pipeline-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 5.5rem 0;
    }
    
    .nav-links {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(3, 5, 10, 0.98);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        z-index: 999;
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .nav-links a {
        font-size: 1.15rem;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-metrics {
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        text-align: center;
    }
    
    .metric-divider {
        width: 60px;
        height: 1px;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .pipeline-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-card {
        padding: 3rem 1.5rem;
    }
    
    .contact-email-btn {
        width: 100%;
        padding: 1.25rem 1.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}