/* ============================================
   CHATLASSO — Design System
   Concept: Lasso / Graphic Selection Tool
   Palette: Pure Black, Warm White, Raw Sienna
   ============================================ */

:root {
    --black:    #0a0a08;
    --white:    #f2ede6;
    --muted:    #6b6660;
    --border:   #222220;
    --accent:   #d4541a;     /* Raw Sienna — no gradients */
    --accent-h: #b8420f;     /* Hover darkened */

    --font-display: 'Syne', sans-serif;
    --font-mono:    'IBM Plex Mono', monospace;
}

/* ====== RESET ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
    background: var(--black);
    color: var(--white);
    font-family: var(--font-display);
    line-height: 1.6;
    overflow-x: hidden;
}

a, a:link, a:visited, a:hover, a:active { 
    text-decoration: none; 
    color: inherit; 
}

/* ====== GRAIN ====== */
.grain {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: cover;
    opacity: 0.028;
    pointer-events: none;
    z-index: 9999;
    animation: grain-shift 0.5s steps(1) infinite;
    contain: paint;
}

@keyframes grain-shift {
    0%  { transform: translate(0,   0); }
    20% { transform: translate(-3%, -5%); }
    40% { transform: translate(-6%,  3%); }
    60% { transform: translate(3%, -2%); }
    80% { transform: translate(-2%,  6%); }
   100% { transform: translate(5%, -3%); }
}

/* ====== TYPE ====== */
.mono { font-family: var(--font-mono); }
.small { font-size: 0.75rem; }
.muted { color: var(--muted); }
.accent-stroke {
    color: transparent;
    -webkit-text-stroke: 2px var(--accent);
}

/* ====== NAV ====== */
#nav {
    position: fixed; top: 0; left: 0; width: 100%;
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 40px;
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, background 0.3s;
}
#nav.scrolled {
    background: var(--black);
    border-color: var(--border);
}
.nav-right { display: flex; align-items: center; gap: 28px; }
.nav-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    transition: color 0.2s;
}
.nav-link:hover { color: var(--white); }
.wordmark {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}
.wordmark span { color: var(--accent); }
.wordmark.small { font-size: 0.9rem; }

.cta-pill {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 8px 16px;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 100px;
    transition: background 0.2s, color 0.2s;
}
.cta-pill:hover { background: var(--accent); color: var(--black); }

/* ====== HERO ====== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding-top: 70px;
}

/* Left */
.hero-text {
    padding: 80px 40px 80px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-right: 1px solid var(--border);
}

.eyebrow {
    font-size: 0.7rem;
    color: var(--muted);
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}

h1 {
    font-size: clamp(3.5rem, 6vw, 5.5rem);
    font-weight: 800;
    line-height: 1.0;
    letter-spacing: -2px;
    margin-bottom: 28px;
}

.block-line { display: block; }
.thin { font-weight: 400; font-size: clamp(2rem, 3.5vw, 3.5rem); color: var(--muted); }

.hero-body {
    font-size: 1.1rem;
    color: var(--muted);
    max-width: 420px;
    margin-bottom: 36px;
    font-family: var(--font-mono);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
}

.btn-solid {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--accent);
    color: var(--black);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}
.btn-solid:hover { background: var(--accent-h); }
.btn-solid:active { transform: scale(0.98); }
.btn-solid.large { font-size: 1rem; padding: 18px 32px; }

.btn-ghost {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    border-bottom: 1px dashed var(--muted);
    padding-bottom: 2px;
    transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--white); border-color: var(--white); }

.platform-list {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.chip {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 4px 10px;
    border: 1px solid var(--border);
    color: var(--muted);
}

/* Right — Demo */
.hero-demo {
    position: relative;
    overflow: hidden;
    background: var(--black);
    cursor: crosshair;
    min-height: 80vh;
}

.demo-hint {
    position: absolute;
    top: 24px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 0.7rem;
    color: var(--muted);
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.4s;
}

#lassoCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.captured-list {
    position: absolute;
    bottom: 24px;
    left: 24px;
    right: 24px;
    background: var(--black);
    border: 1px solid var(--border);
    padding: 16px;
    z-index: 20;
    display: none;
    max-height: 180px;
    overflow-y: auto;
}

.captured-list.visible { display: block; }

#capturedItems {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
}

.captured-chip {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 6px 10px;
    border: 1px solid var(--accent);
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 8px;
    animation: capture-in 0.25s ease-out;
}

@keyframes capture-in {
    from { opacity: 0; transform: translateX(-8px); }
    to   { opacity: 1; transform: translateX(0); }
}

.captured-chip::before { content: "✓"; }

/* ====== HOW IT WORKS ====== */
.how {
    padding: 100px 60px;
    border-top: 1px solid var(--border);
}

.section-label {
    font-size: 0.7rem;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 64px;
}

.steps {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.step {
    flex: 1;
}

.step-num {
    font-size: 0.7rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.step-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 20px;
    color: var(--white);
    opacity: 0.6;
}
.step-icon svg { width: 100%; height: 100%; }

.step h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.step p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.7;
}

.step-divider {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--border);
    margin-top: 80px;
    white-space: nowrap;
    letter-spacing: 4px;
}

/* ====== TICKER ====== */
.ticker-wrapper {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    padding: 18px 0;
}

.ticker-track {
    display: flex;
    align-items: center;
    gap: 32px;
    white-space: nowrap;
    animation: ticker-scroll 25s linear infinite;
    width: max-content;
}

@keyframes ticker-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

.ticker-track span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--muted);
}
.ticker-track .dot { color: var(--accent); font-size: 0.6rem; }

/* ====== BENTO ====== */
.bento {
    padding: 100px 60px;
    border-top: 1px solid var(--border);
}

.bento-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.bento-card {
    background: var(--black);
    padding: 36px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bento-card.wide { grid-column: 1; grid-row: 1; }
.bento-card.tall { grid-row: 1 / 3; grid-column: 3; }

.bento-label {
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.bento-card > p {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    line-height: 1.7;
    margin-top: auto;
}

.bento-visual {
    flex: 1;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Clipboard Visual */
.clipboard-vis {
    gap: 10px;
    border-left: 2px solid var(--accent);
    padding-left: 16px;
}
.clip-line {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    padding: 6px 0;
    border-bottom: 1px dashed var(--border);
    color: var(--white);
}
.clip-line.inactive { color: var(--muted); }
.clip-check { color: var(--accent); width: 14px; flex-shrink: 0; }
.clip-arrow {
    font-size: 0.7rem;
    color: var(--accent);
    margin-top: 12px;
    text-align: right;
}

/* Platform Visual */
.platform-vis { position: relative; align-items: center; }
.platform-orbit {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: center;
}
.orbit-chip {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 4px 10px;
    border: 1px dashed var(--border);
    color: var(--muted);
    transition: border-color 0.2s, color 0.2s;
}
.orbit-chip.lit { border-color: var(--accent); color: var(--accent); }

/* Format Visual */
.format-vis { gap: 0; }
.format-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    transition: color 0.2s;
}
.format-row span { color: var(--white); min-width: 48px; }
.format-row.active { color: var(--accent); }
.format-row.active span { color: var(--accent); }

/* Lock Visual */
.lock-vis {
    align-items: center;
    justify-content: flex-start;
}
.lock-vis svg {
    width: 80px;
    height: 100px;
    color: var(--white);
    opacity: 0.2;
}
.privacy-card p { font-size: 0.85rem; }

/* ====== FINAL CTA ====== */
.final-cta {
    padding: 120px 60px;
    text-align: center;
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.cta-rope {
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 80px;
    overflow: hidden;
}
.cta-rope svg { width: 100%; height: 100%; }
.rope-line {
    animation: rope-crawl 4s linear infinite;
    stroke-dashoffset: 0;
}
@keyframes rope-crawl {
    to { stroke-dashoffset: -36; }
}

.final-cta h2 {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 44px;
}
.final-cta h2 span { color: var(--accent); }

/* ====== FOOTER ====== */
.footer {
    padding: 28px 60px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ====== REVEAL ====== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ====== RESPONSIVE ====== */
@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; }
    .hero-text { border-right: none; border-bottom: 1px solid var(--border); padding: 80px 24px 48px; }
    .hero-demo { min-height: 44vw; }
    .ticker-wrapper { display: none; }
    .how { padding: 60px 24px; }
    .steps { flex-direction: column; gap: 40px; }
    .step-divider { display: none; }
    .bento { padding: 60px 24px; }
    .bento-grid { grid-template-columns: 1fr; gap: 24px; }
    .bento-card.wide, .bento-card.tall { grid-column: auto; grid-row: auto; }
    .final-cta { padding: 80px 24px; }
    .footer { padding: 24px; }
    #nav { padding: 16px 24px; }
}

/* ====== PRINT ====== */
@media print {
    .grain, .hero-demo, .ticker-wrapper, .cta-rope, #nav { display: none !important; }
    body { background: #fff; color: #000; }
    .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 0; }
    .hero-text { border-right: none; padding: 20px; }
    .btn-solid, .btn-ghost { display: none !important; }
    .footer { border-top: 1px solid #ccc; }
    .wordmark span { color: #d4541a; }
    a, a:link { color: #000; text-decoration: underline; }
}

@media (max-width: 768px) {
    .nav-right {
        gap: 12px;
    }

    .nav-link, .cta-pill {
        display: none !important;
        visibility: hidden !important;
        pointer-events: none !important;
    }
    
    #nav {
        background: var(--bg) !important;
        z-index: 1000 !important;
    }

    .hero-demo {
        min-height: 350px;
        border-top: 1px solid var(--border);
    }
    
    h1 {
        font-size: 3.5rem;
        letter-spacing: -1px;
        margin-bottom: 16px;
    }

    .block-line.accent-stroke {
        -webkit-text-stroke: 1.5px var(--accent);
    }
    
    .hero-text {
        padding: 120px 24px 60px;
    }
    
    .thin {
        font-size: 1.8rem;
        display: block;
        margin-top: 8px;
    }
    
    .hero-body {
        font-size: 1rem;
        margin-bottom: 32px;
        max-width: 100%;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .hero-actions .btn-solid,
    .hero-actions .btn-ghost,
    .final-cta .btn-solid.large {
        width: 100%;
        justify-content: center;
        text-align: center;
        padding: 16px;
        font-size: 0.9rem;
    }

    .bento-card {
        padding: 24px;
    }

    .footer {
        flex-direction: column;
        gap: 16px;
        align-items: center;
        text-align: center;
    }
}