/* ═══════════════════════════════════════════════════════════
   AXIAL — Self-Healing Browser Automation
   Avirn Design System: Obsidian Void + Titanium Silver
   ═══════════════════════════════════════════════════════════ */
/* Fonts loaded via <link> in HTML — no @import needed */

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

:root {
    --bg: #000000;
    --s1: #0a0a0a;
    --s2: #111111;
    --s3: #1a1a1a;
    --ti-100: #f5f5f7;
    --ti-200: #d1d1d6;
    --ti-300: #a1a1a6;
    --ti-400: #8e8e93;
    --ti-500: #636366;
    --ti-600: #48484a;
    --ti-700: #3a3a3c;
    --ti-800: #2c2c2e;
    --ti-900: #1c1c1e;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', 'SF Mono', monospace;
    --ease: cubic-bezier(.25, .46, .45, .94);
    --spring: cubic-bezier(.22, 1, .36, 1);
    --smooth: cubic-bezier(.16, 1, .3, 1);
    --max-w: 1100px;
    --px: clamp(20px, 4vw, 40px);
}

html {
    background: var(--bg);
    color: var(--ti-100);
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font);
    line-height: 1.5;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
::selection { background: rgba(255, 255, 255, 0.1); }

/* ═══ Film Grain ═══ */
.noise-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    pointer-events: none;
    opacity: 0.018;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-size: 256px 256px;
}

/* ═══ Ambient Glow ═══ */
.ambient-glow { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.glow-orb { position: absolute; border-radius: 50%; filter: blur(120px); }
.glow-1 {
    top: -20%; right: -10%; width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(161, 161, 170, 0.04), transparent 70%);
    animation: glowDrift1 20s ease-in-out infinite alternate;
}
.glow-2 {
    bottom: -20%; left: -10%; width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(200, 200, 210, 0.03), transparent 70%);
    animation: glowDrift2 25s ease-in-out infinite alternate;
}
@keyframes glowDrift1 { 0% { transform: translate(0, 0) scale(1); } 100% { transform: translate(-80px, 60px) scale(1.15); } }
@keyframes glowDrift2 { 0% { transform: translate(0, 0) scale(1); } 100% { transform: translate(60px, -40px) scale(1.1); } }

/* ═══ Loader ═══ */
.loader {
    position: fixed; inset: 0; z-index: 9999; background: var(--bg);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    transition: opacity 1s var(--smooth), filter 0.8s;
}
.loader.out { opacity: 0; filter: blur(30px); pointer-events: none; }
.loader-ring {
    width: 44px; height: 44px; border-radius: 50%;
    border: 2px solid var(--ti-800); border-top-color: var(--ti-300);
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loader-word {
    margin-top: 28px; font-size: 10px; font-weight: 700;
    letter-spacing: 0.5em; color: var(--ti-600);
    opacity: 0; transform: translateY(6px);
    animation: fadeUp 0.6s var(--smooth) 0.3s forwards;
}
@keyframes fadeUp { to { opacity: 0.6; transform: translateY(0); } }

/* ═══ Nav ═══ */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    height: 56px; display: flex; align-items: center;
    background: transparent; border-bottom: 1px solid transparent;
    transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
    opacity: 0; transform: translateY(-8px);
    animation: fadeUp 0.6s var(--smooth) 0.8s forwards;
}
.nav.scrolled {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border-bottom-color: var(--border);
}
.nav-inner {
    max-width: var(--max-w); width: 100%; margin: 0 auto;
    padding: 0 var(--px); display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { font-size: 14px; font-weight: 900; letter-spacing: 0.15em; color: var(--ti-100); transition: opacity 0.2s; }
.nav-logo:hover { opacity: 0.7; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
    font-size: 13px; font-weight: 500; color: var(--ti-500);
    transition: color 0.2s; position: relative;
}
.nav-link:hover { color: var(--ti-100); }
.nav-link::after {
    content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
    height: 1px; background: var(--ti-300);
    transform: scaleX(0); transition: transform 0.3s var(--spring); transform-origin: left;
}
.nav-link:hover::after { transform: scaleX(1); }

/* ═══ Hero ═══ */
.hero {
    position: relative; min-height: 100vh; min-height: 100dvh;
    display: flex; align-items: center; justify-content: center;
    text-align: center; padding: 0 var(--px); overflow: hidden;
}
.hero-grid {
    position: absolute; inset: 0; pointer-events: none;
    display: flex; justify-content: space-between; padding: 0 var(--px);
    opacity: 0; animation: gridFade 2s ease 0.6s forwards;
}
@keyframes gridFade { to { opacity: 1; } }
.grid-line { width: 1px; height: 100%; background: linear-gradient(to bottom, transparent 0%, var(--border) 20%, var(--border) 80%, transparent 100%); }
.hero-content {
    position: relative; z-index: 2; max-width: 700px;
    opacity: 0; transform: translateY(40px);
    animation: heroReveal 1s var(--smooth) 1.2s forwards;
}
@keyframes heroReveal { to { opacity: 1; transform: translateY(0); } }
.hero-eyebrow {
    font-size: 10px; font-weight: 600; letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--ti-600); margin-bottom: 36px;
    display: inline-flex; align-items: center; gap: 16px;
}
.hero-eyebrow::before, .hero-eyebrow::after { content: ''; width: 24px; height: 1px; background: var(--ti-800); }
.hero-title {
    font-size: clamp(3rem, 8vw, 6.5rem); font-weight: 900;
    line-height: 0.95; letter-spacing: -0.05em; margin-bottom: 28px;
}
.word {
    display: inline-block;
    background: linear-gradient(180deg, #FFF 0%, #F4F4F5 25%, #D4D4D8 55%, #A1A1AA 85%, #8E8E93 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    opacity: 0; transform: translateY(20px);
    animation: wordIn 0.7s var(--smooth) forwards;
    animation-delay: calc(1.2s + var(--d));
}
@keyframes wordIn { to { opacity: 1; transform: translateY(0); } }
.hero-sub {
    font-size: clamp(0.9rem, 1.4vw, 1.05rem); color: var(--ti-400);
    max-width: 480px; margin: 0 auto 40px; line-height: 1.7; font-weight: 400;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.scroll-hint { margin-top: 64px; display: flex; justify-content: center; }
.scroll-line {
    width: 1px; height: 48px;
    background: linear-gradient(to bottom, var(--ti-700), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse { 0%, 100% { opacity: 0.3; transform: scaleY(0.6); } 50% { opacity: 0.8; transform: scaleY(1); } }

/* ═══ Buttons ═══ */
.btn-primary {
    padding: 14px 32px; border-radius: 980px; background: #fff; color: #000;
    font-size: 13px; font-weight: 700; letter-spacing: -0.01em;
    transition: all 0.3s var(--spring);
    display: inline-flex; align-items: center; gap: 8px;
    position: relative; overflow: hidden;
}
.btn-primary::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.2) 50%, rgba(255,255,255,0) 100%);
    transform: translateX(-100%); transition: transform 0.6s;
}
.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,255,255,0.12), 0 0 60px rgba(255,255,255,0.04); }
.btn-primary:active { transform: scale(0.98) translateY(0); }
.btn-secondary {
    padding: 14px 32px; border-radius: 980px;
    border: 1px solid var(--border-hover); color: var(--ti-300);
    font-size: 13px; font-weight: 600;
    transition: all 0.3s var(--spring);
    display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { border-color: var(--ti-600); color: var(--ti-100); background: rgba(255,255,255,0.03); transform: translateY(-2px); }
.btn-secondary:active { transform: scale(0.98); }

/* ═══ Sections ═══ */
.section-header { text-align: center; max-width: 540px; margin: 0 auto 64px; }
.label { font-size: 10px; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ti-500); margin-bottom: 16px; display: block; }
.section-title {
    font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 900; letter-spacing: -0.04em;
    margin-bottom: 16px; line-height: 1;
    background: linear-gradient(180deg, #FFF 0%, #D4D4D8 60%, #A1A1AA 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-sub { font-size: 14px; color: var(--ti-500); line-height: 1.7; }
.divider { max-width: var(--max-w); margin: 0 auto; height: 1px; position: relative; }
.divider::after { content: ''; position: absolute; left: var(--px); right: var(--px); top: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--border-hover) 50%, transparent); }

/* ═══ Terminal Demo ═══ */
.demo-section { padding: 0 var(--px) 80px; position: relative; z-index: 1; }
.demo-inner { max-width: 780px; margin: 0 auto; }
.terminal {
    border-radius: 12px; overflow: hidden;
    border: 1px solid var(--border);
    background: var(--s1);
    box-shadow: 0 0 80px rgba(0, 0, 0, 0.4);
}
.terminal-bar {
    padding: 12px 16px; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; gap: 8px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--ti-800); }
.terminal-title { font-size: 11px; color: var(--ti-600); margin-left: 8px; font-weight: 500; }
.terminal-body { padding: 24px; overflow-x: auto; }
.terminal-body pre { margin: 0; font-family: var(--mono); font-size: 12px; line-height: 1.7; color: var(--ti-300); white-space: pre; }
.terminal-body .c { color: var(--ti-600); }
.terminal-body .k { color: var(--ti-100); font-weight: 600; }
.terminal-body .s { color: #a8e6a1; }

/* ═══ Waterfall Steps ═══ */
.waterfall { padding: 160px var(--px); position: relative; z-index: 1; }
.steps-grid {
    max-width: var(--max-w); margin: 0 auto;
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border);
    border-radius: 16px; overflow: hidden;
    box-shadow: 0 0 80px rgba(0, 0, 0, 0.4);
}
.step-card {
    padding: 36px 28px; background: var(--bg);
    transition: background 0.3s;
    opacity: 0; transform: translateY(20px);
}
.step-card[data-visible] {
    opacity: 1; transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s var(--spring), background 0.3s;
}
.step-card:hover { background: var(--s1); }
.step-num {
    font-size: 10px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--ti-600); margin-bottom: 12px;
    padding: 3px 8px; border-radius: 980px; border: 1px solid var(--border);
    display: inline-block; transition: border-color 0.3s, color 0.3s;
}
.step-card:hover .step-num { border-color: var(--ti-500); color: var(--ti-300); }
.step-card h3 { font-size: 15px; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 8px; }
.step-card p { font-size: 12px; color: var(--ti-500); line-height: 1.7; }

/* ═══ GUI Section ═══ */
.gui-section { padding: 160px var(--px); position: relative; z-index: 1; }
.gui-features {
    max-width: var(--max-w); margin: 0 auto;
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 1px; background: var(--border);
    border-radius: 16px; overflow: hidden;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.3);
}
.gui-card {
    padding: 40px 28px; background: var(--bg); transition: background 0.3s;
    opacity: 0; transform: translateY(20px);
}
.gui-card[data-visible] {
    opacity: 1; transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s var(--spring), background 0.3s;
}
.gui-card:hover { background: var(--s1); }
.gui-icon {
    width: 40px; height: 40px; margin-bottom: 20px;
    border-radius: 10px; background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    transition: border-color 0.3s;
}
.gui-card:hover .gui-icon { border-color: var(--border-hover); }
.gui-icon svg { width: 20px; height: 20px; stroke: var(--ti-400); transition: stroke 0.3s; }
.gui-card:hover .gui-icon svg { stroke: var(--ti-100); }
.gui-card h3 { font-size: 14px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.01em; }
.gui-card p { font-size: 12px; color: var(--ti-500); line-height: 1.7; }

/* ═══ Features Grid ═══ */
.features { padding: 160px var(--px); position: relative; z-index: 1; }
.feature-grid {
    max-width: var(--max-w); margin: 0 auto;
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border);
    border-radius: 16px; overflow: hidden;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.3);
}
.feat-card {
    padding: 36px 28px; background: var(--bg); transition: background 0.3s;
    opacity: 0; transform: translateY(20px);
}
.feat-card[data-visible] {
    opacity: 1; transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s var(--spring), background 0.3s;
}
.feat-card:hover { background: var(--s1); }
.feat-card h3 { font-size: 14px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.01em; }
.feat-card p { font-size: 12px; color: var(--ti-500); line-height: 1.7; }

/* ═══ API Section ═══ */
.api-section { padding: 160px var(--px); position: relative; z-index: 1; }
.api-grid {
    max-width: var(--max-w); margin: 0 auto;
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 1px; background: var(--border);
    border-radius: 16px; overflow: hidden;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.3);
}
.api-col {
    padding: 36px 28px; background: var(--bg); transition: background 0.3s;
    opacity: 0; transform: translateY(20px);
}
.api-col[data-visible] {
    opacity: 1; transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s var(--spring), background 0.3s;
}
.api-col:hover { background: var(--s1); }
.api-col h3 { font-size: 14px; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.01em; }
.api-code {
    font-family: var(--mono); font-size: 11px; line-height: 1.8;
    color: var(--ti-400); white-space: pre; margin: 0;
    background: transparent; border: none; overflow-x: auto;
}

/* ═══ CTA ═══ */
.final-cta { padding: 160px var(--px); text-align: center; position: relative; z-index: 1; }
.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900; letter-spacing: -0.04em; margin-bottom: 16px;
    background: linear-gradient(180deg, #FFF 0%, #D4D4D8 70%, #A1A1AA 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.cta-sub { font-size: 14px; color: var(--ti-500); margin-bottom: 36px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-note { font-size: 11px; color: var(--ti-600); margin-top: 24px; font-weight: 500; }

/* ═══ Footer ═══ */
.footer { border-top: 1px solid var(--border); padding: 48px var(--px); position: relative; z-index: 1; }
.footer-inner { max-width: var(--max-w); margin: 0 auto; text-align: center; }
.footer-brand { font-size: 12px; font-weight: 900; letter-spacing: 0.2em; color: var(--ti-600); margin-bottom: 20px; }
.footer-links { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { font-size: 12px; color: var(--ti-600); transition: color 0.2s; font-weight: 500; }
.footer-links a:hover { color: var(--ti-100); }
.footer-copy { font-size: 11px; color: var(--ti-700); }

/* ═══ Responsive ═══ */
@media (max-width: 900px) {
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .gui-features { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .api-grid { grid-template-columns: 1fr; }
}
/* ═══ Mobile Menu ═══ */
.nav-toggle {
    display: none; cursor: pointer; background: none; border: none; padding: 6px;
    width: 32px; height: 32px; position: relative; z-index: 110;
}
.nav-toggle span {
    display: block; width: 18px; height: 1.5px; background: var(--ti-300);
    margin: 4px auto; transition: all 0.3s var(--spring);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(3.5px, 3.5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(3.5px, -3.5px); }

@media (max-width: 600px) {
    .nav-toggle { display: block; }
    .nav-links {
        display: none; position: fixed; top: 56px; left: 0; right: 0;
        background: rgba(0, 0, 0, 0.95); backdrop-filter: blur(40px);
        -webkit-backdrop-filter: blur(40px);
        flex-direction: column; padding: 24px var(--px); gap: 20px;
        border-bottom: 1px solid var(--border);
    }
    .nav-links.open { display: flex; }
    .nav-link { font-size: 15px; }
    .hero-title { font-size: clamp(2.5rem, 10vw, 4rem); }
    .steps-grid { grid-template-columns: 1fr; }
    .gui-features { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn-primary, .btn-secondary { width: 100%; max-width: 300px; justify-content: center; }
    .ambient-glow { display: none; }
}