/* Vankadel — Robotic Intelligence */

:root {
    --black: #0a0a0a;
    --white: #fff;
    --g50: #fafafa;
    --g100: #f5f5f5;
    --g200: #e5e5e5;
    --g300: #d4d4d4;
    --g400: #a3a3a3;
    --g500: #737373;
    --g600: #525252;
    --g700: #404040;
    --g800: #262626;
    --g900: #171717;
    --green: #22c55e;
    --red: #ef4444;
    --amber: #f59e0b;
    --font: 'DM Sans', system-ui, sans-serif;
    --serif: 'Newsreader', Georgia, serif;
    --mono: 'JetBrains Mono', monospace;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { 
    font-family: var(--font); 
    font-size: 15px; 
    line-height: 1.6; 
    color: var(--g600); 
    background: var(--g50);
    -webkit-font-smoothing: antialiased; 
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 400; color: var(--g900); line-height: 1.15; }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h2 em, h1 em { font-style: italic; }
h3 { font-size: 1rem; font-family: var(--font); font-weight: 600; }
p { margin-bottom: 0.75em; }
p:last-child { margin-bottom: 0; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Buttons */
.btn { 
    display: inline-flex; 
    align-items: center; 
    gap: 8px; 
    padding: 12px 20px; 
    font-size: 14px; 
    font-weight: 500; 
    border-radius: 6px; 
    transition: all 0.15s; 
}
.btn-dark { background: var(--g900); color: var(--white); }
.btn-dark:hover { background: var(--black); }
.btn-white { background: var(--white); color: var(--g900); }
.btn-white:hover { background: var(--g100); }
.btn-ghost-light { color: var(--g400); }
.btn-ghost-light:hover { color: var(--white); }
.btn-nav { padding: 8px 16px; background: var(--g900); color: var(--white); border-radius: 6px; font-size: 13px; }

/* Header */
.header { 
    position: fixed; 
    top: 0; left: 0; right: 0; 
    z-index: 100; 
    padding: 16px 0; 
    background: rgba(250,250,250,0.9); 
    backdrop-filter: blur(12px); 
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 18px; font-weight: 700; color: var(--g900); letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px; }
.logo-icon { width: 24px; height: 24px; object-fit: contain; }
.nav { display: none; align-items: center; gap: 32px; }
.nav a { font-size: 14px; font-weight: 500; color: var(--g500); }
.nav a:hover { color: var(--g900); }
@media (min-width: 768px) { .nav { display: flex; } }
.menu-btn { display: flex; flex-direction: column; gap: 5px; padding: 8px; background: none; border: none; cursor: pointer; }
.menu-btn span { width: 20px; height: 2px; background: var(--g900); transition: 0.2s; }
@media (min-width: 768px) { .menu-btn { display: none; } }
.nav.open { display: flex; position: fixed; inset: 0; background: var(--white); flex-direction: column; justify-content: center; align-items: center; gap: 24px; z-index: 99; }
.nav.open a { font-size: 20px; }
.menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(3px, 3px); }
.menu-btn.active span:nth-child(2) { transform: rotate(-45deg) translate(0, 0); }

/* Hero */
.hero { 
    padding: 120px 0 48px; 
    background: var(--g50); 
}
.hero-top { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 32px; 
    align-items: center; 
    margin-bottom: 24px; 
}
@media (min-width: 900px) { 
    .hero-top { grid-template-columns: 1fr 1.1fr; gap: 48px; } 
}
.hero-text h1 { margin-bottom: 8px; }
.hero-sub { font-size: 16px; color: var(--g500); margin-bottom: 24px; }

/* Hero Card - matching reference */
.hero-card { position: relative; }
.hero-img { 
    position: relative; 
    border-radius: 12px; 
    overflow: hidden; 
    background: var(--g900);
}
.hero-img img { 
    width: 100%; 
    height: auto; 
    display: block; 
    aspect-ratio: 16/10;
    object-fit: cover;
    opacity: 0.85;
}
.hero-img-overlay { 
    position: absolute; 
    bottom: 0; left: 0; right: 0; 
    padding: 20px; 
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
}
.overlay-tag { 
    display: inline-block;
    padding: 4px 10px; 
    background: rgba(255,255,255,0.15); 
    border-radius: 4px; 
    font-size: 11px; 
    font-weight: 600; 
    color: var(--white); 
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}
.hero-img-overlay p { font-size: 13px; color: rgba(255,255,255,0.7); margin: 0; }
.hero-arrow { 
    position: absolute; 
    bottom: 16px; right: 16px; 
    width: 40px; height: 40px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    background: var(--white); 
    border-radius: 50%; 
    color: var(--g900);
    transition: transform 0.2s;
}
.hero-arrow:hover { transform: scale(1.1); }

/* Hero Stats - matching reference exactly */
.hero-stats { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 12px; 
}
@media (min-width: 640px) { 
    .hero-stats { grid-template-columns: repeat(4, 1fr); } 
}
.stat { 
    position: relative;
    padding: 20px; 
    background: var(--white); 
    border-radius: 12px;
    border: 1px solid var(--g200);
}
.stat-val { 
    display: block; 
    font-family: var(--serif); 
    font-size: 1.75rem; 
    color: var(--g900); 
    line-height: 1.2;
    margin-bottom: 2px;
}
.stat-lbl { font-size: 12px; color: var(--g500); }
.stat-arrow { 
    position: absolute; 
    top: 16px; right: 16px; 
    width: 28px; height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--g100);
    border-radius: 50%;
    color: var(--g600);
    transition: background 0.15s;
}
.stat-arrow:hover { background: var(--g200); }
.stat-label-only { 
    display: flex; 
    align-items: center; 
    justify-content: center;
}
.stat-tag { 
    font-size: 13px; 
    font-weight: 600; 
    color: var(--g500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.stat-dark { background: var(--g900); border-color: var(--g900); }
.stat-dark .stat-val { color: var(--white); }
.stat-dark .stat-lbl { color: var(--g400); }

/* Sections */
.section { 
    padding: 72px 0; 
    background: var(--white);
    opacity: 0; 
    transform: translateY(20px); 
    transition: opacity 0.5s, transform 0.5s; 
}
.section.in, .cta.in { opacity: 1; transform: translateY(0); }
.section-alt { background: var(--g50); }
.section-head { max-width: 600px; margin: 0 auto 40px; text-align: center; }
.label { 
    display: inline-block; 
    font-size: 11px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.08em; 
    color: var(--g400); 
    margin-bottom: 8px; 
}
.intro { max-width: 640px; margin: 0 auto 32px; text-align: center; font-size: 16px; }

/* Log Block */
.log-block { 
    max-width: 680px; 
    margin: 0 auto 40px; 
    background: var(--g900); 
    border-radius: 10px; 
    overflow: hidden; 
}
.log-bar { 
    display: flex; 
    align-items: center; 
    gap: 6px; 
    padding: 10px 14px; 
    background: var(--g800); 
}
.log-bar span:not(.log-title) { width: 10px; height: 10px; border-radius: 50%; }
.log-bar span:nth-child(1) { background: #ff5f57; }
.log-bar span:nth-child(2) { background: #febc2e; }
.log-bar span:nth-child(3) { background: #28c840; }
.log-title { margin-left: 10px; font-family: var(--mono); font-size: 12px; color: var(--g500); }
.log-body { padding: 16px; overflow-x: auto; }
.log-body code { 
    font-family: var(--mono); 
    font-size: 12px; 
    line-height: 1.9; 
    color: var(--g300); 
    white-space: pre; 
    display: block; 
}
.log-body .t { color: var(--g500); }
.log-body .w { color: var(--amber); }
.log-body .e { color: var(--red); }
.log-body .c { color: #f87171; font-weight: 600; }

/* Problem Grid */
.problem-grid { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 24px; 
    max-width: 700px; 
    margin: 0 auto; 
}
@media (min-width: 640px) { .problem-grid { grid-template-columns: 1fr 1fr; } }
.q-lead { font-family: var(--serif); font-size: 1.1rem; color: var(--g900); margin-bottom: 12px; }
.problem-questions ul { display: flex; flex-wrap: wrap; gap: 8px; }
.problem-questions li { 
    padding: 8px 14px; 
    background: var(--g100); 
    border-radius: 20px; 
    font-size: 13px; 
    color: var(--g600); 
}
.answer-label { font-size: 13px; color: var(--g500); margin-bottom: 8px; }
.answer-box { 
    padding: 16px; 
    background: var(--g100); 
    border-radius: 8px; 
    margin-bottom: 12px; 
}
.answer-box p { font-family: var(--mono); font-size: 14px; color: var(--g600); margin: 0; }
.answer-verdict { font-weight: 600; color: var(--g900); line-height: 1.5; }

/* Compare Columns */
.compare { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 16px; 
    max-width: 700px; 
    margin: 0 auto 32px; 
}
@media (min-width: 640px) { .compare { grid-template-columns: 1fr 1fr; } }
.compare-col { padding: 24px; border-radius: 10px; }
.compare-tag { 
    display: inline-block;
    font-size: 11px; 
    font-weight: 600; 
    text-transform: uppercase; 
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}
.compare-col li { padding: 6px 0; padding-left: 18px; position: relative; font-size: 14px; }
.compare-not { background: var(--g100); }
.compare-not .compare-tag { color: var(--g500); }
.compare-not li { color: var(--g500); }
.compare-not li::before { content: '×'; position: absolute; left: 0; color: var(--g400); }
.compare-does { background: var(--g900); }
.compare-does .compare-tag { color: var(--g400); }
.compare-does li { color: var(--g300); }
.compare-does li::before { content: '→'; position: absolute; left: 0; color: var(--green); }
.analogy { text-align: center; font-style: italic; color: var(--g500); max-width: 480px; margin: 0 auto; }

/* Scenario */
.scenario { 
    max-width: 600px; 
    margin: 0 auto 32px; 
    text-align: center; 
    padding: 20px; 
    background: var(--g50); 
    border-radius: 8px; 
    font-size: 14px;
}

/* Before/After */
.ba-grid { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 20px; 
    margin-bottom: 24px; 
}
@media (min-width: 768px) { .ba-grid { grid-template-columns: 1fr 1fr; } }
.ba-card { padding: 24px; border-radius: 12px; border: 1px solid var(--g200); background: var(--white); }
.ba-tag { 
    display: inline-block;
    padding: 4px 10px; 
    border-radius: 4px; 
    font-size: 10px; 
    font-weight: 600; 
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}
.ba-before .ba-tag { background: var(--g100); color: var(--g600); }
.ba-after .ba-tag { background: var(--g900); color: var(--white); }
.ba-card h3 { margin-bottom: 16px; }
.ba-list li { padding: 5px 0; font-size: 14px; color: var(--g500); padding-left: 16px; position: relative; }
.ba-list li::before { content: '•'; position: absolute; left: 0; color: var(--g400); }
.ba-report { margin-bottom: 20px; }
.report-section { margin-bottom: 16px; }
.report-label { 
    display: block;
    font-size: 10px; 
    font-weight: 600; 
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--g400);
    margin-bottom: 6px;
}
.report-section p { font-size: 14px; color: var(--g700); margin: 0; line-height: 1.6; }
.report-section ul li { padding: 4px 0; font-size: 13px; color: var(--g600); padding-left: 16px; position: relative; }
.report-section ul li::before { content: '→'; position: absolute; left: 0; color: var(--g400); }
.ba-footer { display: flex; gap: 24px; padding-top: 16px; border-top: 1px solid var(--g200); }
.ba-stat { display: flex; flex-direction: column; }
.ba-stat span:first-child { font-family: var(--serif); font-size: 1.25rem; color: var(--g900); }
.ba-stat span:last-child { font-size: 11px; color: var(--g500); }
.ba-no { color: var(--red) !important; }
.ba-yes { color: var(--green) !important; }
.ba-verdict { text-align: center; font-family: var(--serif); font-size: 1.1rem; color: var(--g900); }

/* Steps */
.steps { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 24px; 
    max-width: 800px; 
    margin: 0 auto; 
}
@media (min-width: 640px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step { text-align: center; padding: 24px; background: var(--white); border-radius: 12px; }
.step-n { display: block; font-family: var(--serif); font-size: 2.5rem; color: var(--g200); margin-bottom: 8px; }
.step h3 { margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--g500); margin: 0; }

/* Diff Compare */
.diff-compare { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 16px; 
    max-width: 700px; 
    margin: 0 auto 32px; 
}
@media (min-width: 640px) { .diff-compare { grid-template-columns: 1fr 1fr; } }
.diff-box { padding: 24px; border-radius: 10px; }
.diff-label { display: block; font-size: 11px; color: var(--g500); margin-bottom: 8px; }
.diff-box p { font-family: var(--mono); font-size: 14px; margin: 0; }
.diff-other { background: var(--g100); }
.diff-other p { color: var(--g600); }
.diff-aurel { background: var(--g900); }
.diff-aurel .diff-label { color: var(--g500); }
.diff-aurel p { color: var(--white); }
.diff-features { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 16px; 
    max-width: 700px; 
    margin: 0 auto; 
}
@media (min-width: 640px) { .diff-features { grid-template-columns: 1fr 1fr; } }
.diff-feat { padding: 20px; background: var(--g50); border-radius: 10px; }
.diff-feat h3 { margin-bottom: 6px; }
.diff-feat p { font-size: 14px; color: var(--g500); margin: 0; }

/* Serve */
.serve-grid { 
    display: flex; 
    flex-wrap: wrap; 
    justify-content: center; 
    gap: 10px; 
}
.serve-grid span { 
    padding: 10px 18px; 
    background: var(--white); 
    border: 1px solid var(--g200); 
    border-radius: 8px; 
    font-size: 14px; 
    color: var(--g700); 
}

/* About */
.about-grid { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 32px; 
}
@media (min-width: 768px) { .about-grid { grid-template-columns: 1.5fr 1fr; } }
.about-text p { font-size: 15px; color: var(--g600); }
.vision-cards { display: flex; flex-direction: column; gap: 12px; }
.vision-card { padding: 20px; background: var(--g50); border-radius: 10px; }
.vision-label { display: block; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--g400); margin-bottom: 6px; }
.vision-card p { font-size: 14px; color: var(--g700); margin: 0; }
.vision-dark { background: var(--g900); }
.vision-dark .vision-label { color: var(--g500); }
.vision-dark p { color: var(--white); }

/* CTA */
.cta { 
    padding: 64px 0; 
    background: var(--g900); 
    text-align: center;
    opacity: 0; 
    transform: translateY(20px); 
    transition: opacity 0.5s, transform 0.5s;
}
.cta h2 { color: var(--white); margin-bottom: 20px; }
.cta-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* Footer */
.footer { background: var(--black); padding: 48px 0 24px; }
.footer-inner { 
    display: grid; 
    grid-template-columns: 1fr; 
    gap: 32px; 
    padding-bottom: 32px; 
    border-bottom: 1px solid var(--g800); 
}
@media (min-width: 640px) { .footer-inner { grid-template-columns: 1fr auto; } }
.footer-brand .logo { color: var(--white); display: block; margin-bottom: 4px; }
.footer-brand p { font-size: 13px; color: var(--g500); margin: 0; }
.footer-links { display: flex; gap: 48px; }
.footer-col h4 { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: var(--g500); margin-bottom: 12px; }
.footer-col a { display: block; font-size: 13px; color: var(--g400); padding: 4px 0; }
.footer-col a:hover { color: var(--white); }
.copy { font-size: 12px; color: var(--g600); margin-top: 24px; }

/* Responsive */
@media (max-width: 640px) {
    .hero { padding: 100px 0 40px; }
    .section { padding: 56px 0; }
    .footer-links { flex-wrap: wrap; gap: 32px; }
}