/* ==========================================================================
   lossless.dev — Brutalist Signal Chain
   Palette: #1c1815, #2a2320, #3d332c, #c4623a, #a8826a, #e87f4a, #e8ddd0, #8a7e72
   Fonts: Archivo Black, Source Serif 4, Space Mono
   ========================================================================== */

:root {
    --bg-primary: #1c1815;
    --bg-elevated: #2a2320;
    --surface: #3d332c;
    --terracotta: #c4623a;
    --copper: #a8826a;
    --rust-glow: #e87f4a;
    --text-primary: #e8ddd0;
    --text-muted: #8a7e72;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.lossless {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Source Serif 4', Georgia, serif;
    font-weight: 400;
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
}

/* Grain overlay */
body.lossless::after {
    content: '';
    position: fixed;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E") repeat;
    opacity: 0.04;
    pointer-events: none;
    z-index: 9999;
}

/* ==========================================================================
   Organic Blob Signal Artifacts
   ========================================================================== */

.blob {
    position: fixed;
    z-index: 0;
    pointer-events: none;
}

.blob path {
    fill: var(--terracotta);
}

.blob--1 {
    width: 400px;
    height: 400px;
    top: 10vh;
    left: -100px;
    opacity: 0.18;
    animation: blobPulse1 10s ease-in-out infinite;
}

.blob--2 {
    width: 300px;
    height: 300px;
    top: 35vh;
    right: -80px;
    opacity: 0.15;
    animation: blobPulse2 12s ease-in-out infinite;
}

.blob--3 {
    width: 250px;
    height: 250px;
    top: 60vh;
    left: 20vw;
    opacity: 0.12;
    animation: blobPulse3 8s ease-in-out infinite;
}

.blob--4 {
    width: 350px;
    height: 350px;
    top: 80vh;
    right: 15vw;
    opacity: 0.2;
    animation: blobPulse1 11s ease-in-out infinite;
}

.blob--5 {
    width: 280px;
    height: 280px;
    top: 120vh;
    left: 5vw;
    opacity: 0.16;
    animation: blobPulse2 9s ease-in-out infinite;
}

@keyframes blobPulse1 {
    0%, 100% { transform: scale(0.97) rotate(0deg); }
    50% { transform: scale(1.03) rotate(2deg); }
}

@keyframes blobPulse2 {
    0%, 100% { transform: scale(1.03) rotate(0deg); }
    50% { transform: scale(0.97) rotate(-2deg); }
}

@keyframes blobPulse3 {
    0%, 100% { transform: scale(0.98) rotate(1deg); }
    50% { transform: scale(1.02) rotate(-1deg); }
}

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

.hero {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding: 2rem 6vw;
    overflow: hidden;
}

.hero__title {
    font-family: 'Archivo Black', sans-serif;
    font-weight: 400;
    font-size: 18vw;
    line-height: 0.88;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    color: var(--text-primary);
    white-space: nowrap;
    user-select: none;
    margin-top: -0.05em;
}

.hero__tagline {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: clamp(0.7rem, 1.2vw, 1rem);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-top: 2rem;
    opacity: 0;
    animation: taglineFadeIn 1.5s ease 0.8s forwards;
}

.hero__scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollPulse 2s ease-in-out infinite;
}

.hero__chevron {
    display: block;
    opacity: 0.7;
}

@keyframes taglineFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.4; transform: translateX(-50%) translateY(0); }
    50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* ==========================================================================
   Signal Chain Sections
   ========================================================================== */

.signal {
    position: relative;
    z-index: 1;
    padding: 80px 6vw;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.signal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered children */
.signal.is-visible .signal__label { transition-delay: 0s; }
.signal.is-visible .signal__heading { transition-delay: 0.12s; }
.signal.is-visible .signal__content { transition-delay: 0.24s; }

.signal__label,
.signal__heading,
.signal__content {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.signal.is-visible .signal__label,
.signal.is-visible .signal__heading,
.signal.is-visible .signal__content {
    opacity: 1;
    transform: translateY(0);
}

/* Alternating backgrounds */
.signal--source { background-color: var(--bg-primary); }
.signal--encode { background-color: var(--bg-elevated); }
.signal--transmit { background-color: var(--bg-primary); }
.signal--decode { background-color: var(--bg-elevated); }
.signal--output { background-color: var(--bg-primary); }

.signal__label {
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 1.5rem;
}

.signal__heading {
    font-family: 'Archivo Black', sans-serif;
    font-weight: 400;
    font-size: clamp(3rem, 8vw, 8vw);
    line-height: 0.88;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    color: var(--text-primary);
    margin-bottom: 3rem;
    overflow: hidden;
}

.signal--source .signal__heading { color: var(--text-primary); }
.signal--encode .signal__heading { color: var(--copper); }
.signal--transmit .signal__heading { color: var(--terracotta); }
.signal--decode .signal__heading { color: var(--rust-glow); }
.signal--output .signal__heading { color: var(--text-primary); }

.signal__content {
    max-width: 680px;
}

.signal__text {
    font-family: 'Source Serif 4', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.15vw, 1.25rem);
    line-height: 1.65;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    opacity: 0.85;
}

.signal__text:last-of-type {
    margin-bottom: 3rem;
}

.signal__waveform {
    width: 100%;
    max-width: 800px;
    position: relative;
}

.waveform-canvas {
    width: 100%;
    height: 120px;
    display: block;
}

.signal__rule {
    width: 60px;
    height: 2px;
    background-color: var(--surface);
    margin-top: 4rem;
}

/* Alternating alignment — left-heavy asymmetric */
.signal--encode,
.signal--decode {
    align-items: flex-end;
    text-align: right;
}

.signal--encode .signal__content,
.signal--decode .signal__content {
    text-align: right;
}

.signal--encode .signal__rule,
.signal--decode .signal__rule {
    margin-left: auto;
}

/* ==========================================================================
   Waveform Dividers
   ========================================================================== */

.waveform-divider {
    position: relative;
    z-index: 1;
    height: 40px;
    overflow: hidden;
}

.waveform-divider__svg {
    width: 100%;
    height: 100%;
    display: block;
}

.waveform-divider__line {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 1.5s ease-in-out;
}

.waveform-divider.is-drawn .waveform-divider__line {
    stroke-dashoffset: 0;
}

/* ==========================================================================
   Reel-to-Reel (TRANSMIT section background)
   ========================================================================== */

.reel-to-reel {
    position: absolute;
    top: 50%;
    right: 10%;
    transform: translateY(-50%);
    width: 400px;
    height: 300px;
    opacity: 0.3;
    z-index: 0;
    pointer-events: none;
}

.reel-to-reel__svg {
    width: 100%;
    height: 100%;
}

.reel--left {
    animation: reelSpin 120s linear infinite;
    transform-origin: 120px 130px;
}

.reel--right {
    animation: reelSpin 120s linear infinite;
    transform-origin: 280px 130px;
}

@keyframes reelSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Ensure TRANSMIT content sits above reel */
.signal--transmit .signal__label,
.signal--transmit .signal__heading,
.signal--transmit .signal__content {
    position: relative;
    z-index: 1;
}

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

.colophon {
    position: relative;
    z-index: 1;
    padding: 6rem 6vw;
    border-top: 1px solid var(--bg-elevated);
}

.colophon__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.colophon__mark {
    font-family: 'Archivo Black', sans-serif;
    font-weight: 400;
    font-size: 2rem;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    color: var(--surface);
}

.colophon__meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.colophon__sep {
    color: var(--surface);
}

/* ==========================================================================
   Selection & Scrollbar
   ========================================================================== */

::selection {
    background-color: var(--terracotta);
    color: var(--bg-primary);
}

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

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

@media (max-width: 768px) {
    .hero__title {
        font-size: 22vw;
    }

    .signal {
        padding: 5rem 5vw;
        min-height: auto;
    }

    .signal__heading {
        font-size: clamp(2.5rem, 12vw, 6rem);
    }

    .signal--encode,
    .signal--decode {
        align-items: flex-start;
        text-align: left;
    }

    .signal--encode .signal__content,
    .signal--decode .signal__content {
        text-align: left;
    }

    .signal--encode .signal__rule,
    .signal--decode .signal__rule {
        margin-left: 0;
    }

    .blob {
        display: none;
    }

    .reel-to-reel {
        display: none;
    }
}