/* ============================================================
   amamya.net — Signal Processing / Glitch Tutorial Aesthetic
   Colors: #0d0618 #2d1a50 #1a0a2e #c8f53b #00ffb4 #ff0050 #e8f4c8
   Fonts: Nunito 800 (heads), Inter (body), JetBrains Mono (code), Space Grotesk (accent)
   ============================================================ */

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

:root {
    --bg: #0d0618;
    --deep: #2d1a50;
    --darkest: #1a0a2e;
    --chartreuse: #c8f53b;
    --mint: #00ffb4;
    --glitch-red: #ff0050;
    --cream: #e8f4c8;
    --text-primary: #e8f4c8;
    --text-secondary: rgba(232, 244, 200, 0.6);
    --font-head: 'Nunito', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-accent: 'Space Grotesk', sans-serif;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* ── Signal Background ───────────────────────────────────── */
#signal-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

#waveform-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 1;
}

#scanlines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 3px,
        rgba(0, 0, 0, 0.08) 3px,
        rgba(0, 0, 0, 0.08) 4px
    );
    animation: scanlineShift 8s linear infinite;
}

@keyframes scanlineShift {
    0% { background-position: 0 0; }
    100% { background-position: 0 100px; }
}

#noise-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23noise)'/%3E%3C/svg%3E");
    animation: noiseAnim 0.15s steps(4) infinite;
}

@keyframes noiseAnim {
    0% { transform: translate(0, 0); }
    25% { transform: translate(-2px, 1px); }
    50% { transform: translate(2px, -1px); }
    75% { transform: translate(-1px, 2px); }
    100% { transform: translate(1px, -2px); }
}

/* ── Scroll Signal Bar ───────────────────────────────────── */
#scroll-signal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(200, 245, 59, 0.1);
    z-index: 1000;
}

#scroll-beam {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--mint), var(--chartreuse), var(--glitch-red));
    transition: width 0.1s linear;
    box-shadow: 0 0 8px var(--chartreuse);
}

/* ── Main Signal Stream ──────────────────────────────────── */
#signal-stream {
    position: relative;
    z-index: 1;
}

/* ── Scenes / Packets ────────────────────────────────────── */
.scene {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 80px 0;
}

.packet {
    min-height: auto;
    padding: 100px 0;
}

.packet--left .packet-offset {
    margin-left: 6vw;
    margin-right: 20vw;
}

.packet--right .packet-offset {
    margin-left: 20vw;
    margin-right: 6vw;
}

.packet--center .packet-offset {
    margin-left: 10vw;
    margin-right: 10vw;
}

.packet-offset {
    background: rgba(45, 26, 80, 0.35);
    border: 1px solid rgba(200, 245, 59, 0.1);
    border-left: 3px solid var(--chartreuse);
    padding: 40px 48px;
    position: relative;
    backdrop-filter: blur(4px);
}

.packet-offset::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    width: 40px;
    height: 40px;
    border-top: 2px solid var(--mint);
    border-left: 2px solid var(--mint);
}

.packet-offset::after {
    content: '';
    position: absolute;
    bottom: -1px;
    right: -1px;
    width: 40px;
    height: 40px;
    border-bottom: 2px solid var(--mint);
    border-right: 2px solid var(--mint);
}

/* ── Packet Headers ──────────────────────────────────────── */
.packet-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(200, 245, 59, 0.15);
}

.packet-id {
    color: var(--mint);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.packet-type {
    font-family: var(--font-accent);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* ── Hero Scene ──────────────────────────────────────────── */
#hero {
    min-height: 100vh;
    background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(45, 26, 80, 0.6) 0%, transparent 70%);
    justify-content: center;
    align-items: center;
    text-align: left;
    padding-left: 6vw;
    padding-right: 6vw;
}

.scene-inner {
    position: relative;
    z-index: 2;
    max-width: 900px;
}

/* ── Glitch Text Effect ──────────────────────────────────── */
#hero-glitch-wrap {
    position: relative;
    margin-bottom: 32px;
}

#hero-title {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(3rem, 10vw, 7rem);
    color: var(--cream);
    position: relative;
    display: inline-block;
    letter-spacing: -0.02em;
    line-height: 1.05;
}

.glitch-base {
    position: relative;
    display: block;
}

.glitch-layer {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: inherit;
    line-height: inherit;
    letter-spacing: inherit;
}

.glitch-r {
    color: var(--glitch-red);
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    animation: glitchR 4s steps(1) infinite;
    mix-blend-mode: screen;
}

.glitch-g {
    color: var(--mint);
    clip-path: polygon(0 60%, 100% 60%, 100% 100%, 0 100%);
    animation: glitchG 4s steps(1) infinite;
    mix-blend-mode: screen;
}

@keyframes glitchR {
    0%, 90% { transform: translate(0, 0); opacity: 0; }
    91% { transform: translate(-4px, 2px); opacity: 0.8; clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%); }
    92% { transform: translate(4px, -2px); opacity: 0.9; clip-path: polygon(0 15%, 100% 15%, 100% 55%, 0 55%); }
    93% { transform: translate(-2px, 0); opacity: 0.7; clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%); }
    94%, 100% { transform: translate(0, 0); opacity: 0; }
}

@keyframes glitchG {
    0%, 88% { transform: translate(0, 0); opacity: 0; }
    89% { transform: translate(3px, -1px); opacity: 0.7; clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%); }
    90% { transform: translate(-3px, 1px); opacity: 0.85; clip-path: polygon(0 40%, 100% 40%, 100% 75%, 0 75%); }
    91% { transform: translate(2px, 2px); opacity: 0.6; clip-path: polygon(0 80%, 100% 80%, 100% 100%, 0 100%); }
    92%, 100% { transform: translate(0, 0); opacity: 0; }
}

/* Subtle heading glitch */
.glitch-subtle {
    position: relative;
    display: inline-block;
}

.glitch-subtle::before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: -2px;
    color: var(--glitch-red);
    animation: subtleGlitchR 6s steps(1) infinite;
    opacity: 0;
    clip-path: polygon(0 20%, 100% 20%, 100% 50%, 0 50%);
}

.glitch-subtle::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 2px;
    color: var(--mint);
    animation: subtleGlitchG 6s steps(1) infinite;
    opacity: 0;
    clip-path: polygon(0 55%, 100% 55%, 100% 85%, 0 85%);
}

@keyframes subtleGlitchR {
    0%, 94% { opacity: 0; transform: translate(0); }
    95% { opacity: 0.7; transform: translate(-2px, 1px); }
    97% { opacity: 0; transform: translate(0); }
}

@keyframes subtleGlitchG {
    0%, 92% { opacity: 0; transform: translate(0); }
    93% { opacity: 0.6; transform: translate(2px, -1px); }
    95% { opacity: 0; transform: translate(0); }
}

/* ── Hero Subtext ────────────────────────────────────────── */
#hero-sub {
    margin-bottom: 40px;
}

#hero-tagline {
    font-family: var(--font-accent);
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin: 8px 0;
    letter-spacing: 0.02em;
}

.mono-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--chartreuse);
    opacity: 0.6;
    display: block;
}

/* ── Scan Indicator ──────────────────────────────────────── */
#hero-scan-indicator {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
}

.scan-bar {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--chartreuse), transparent);
    animation: scanPulse 2s ease-in-out infinite alternate;
}

@keyframes scanPulse {
    from { opacity: 0.3; }
    to { opacity: 0.9; }
}

.scan-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--chartreuse);
    letter-spacing: 0.2em;
    white-space: nowrap;
    animation: scanPulse 2s ease-in-out infinite alternate;
}

/* ── Scroll Cue ──────────────────────────────────────────── */
#hero-scroll-cue {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.cue-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
}

#cue-arrow {
    animation: arrowBounce 2.5s ease-in-out infinite;
}

@keyframes arrowBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* ── Wave Connectors ─────────────────────────────────────── */
.wave-connector {
    width: 100%;
    pointer-events: none;
}

.wave-connector--bottom {
    position: absolute;
    bottom: 0;
    left: 0;
}

.wave-connector--bottom svg {
    display: block;
    width: 100%;
    height: 80px;
}

.wave-connector--inline {
    margin: 40px 0;
    opacity: 0.6;
}

.wave-connector--inline svg {
    display: block;
    width: 100%;
    height: 60px;
}

/* ── Typography ──────────────────────────────────────────── */
.section-heading {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--cream);
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.body-text {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 20px;
    max-width: 640px;
}

.body-text--light {
    color: rgba(232, 244, 200, 0.75);
}

.mono-code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--chartreuse);
    opacity: 0.7;
    display: block;
    line-height: 1.6;
}

/* ── Annotation Block ────────────────────────────────────── */
.annotation-block {
    margin-top: 24px;
    padding: 16px 20px;
    border-left: 2px solid rgba(0, 255, 180, 0.3);
    background: rgba(0, 255, 180, 0.04);
}

.annotation-line {
    display: block;
}

/* ── Channel Split Bar ───────────────────────────────────── */
.channel-split-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid rgba(200, 245, 59, 0.1);
}

.ch {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 2px;
}

.ch-r {
    background: rgba(255, 0, 80, 0.2);
    color: var(--glitch-red);
    border: 1px solid rgba(255, 0, 80, 0.4);
}

.ch-g {
    background: rgba(0, 255, 180, 0.1);
    color: var(--mint);
    border: 1px solid rgba(0, 255, 180, 0.3);
}

.ch-b {
    background: rgba(45, 26, 80, 0.5);
    color: #6b9fff;
    border: 1px solid rgba(107, 159, 255, 0.3);
}

.ch-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-secondary);
    letter-spacing: 0.15em;
    margin-left: 8px;
}

/* ── Method Grid ─────────────────────────────────────────── */
.method-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.method-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: rgba(26, 10, 46, 0.6);
    border: 1px solid rgba(200, 245, 59, 0.08);
    border-top: 2px solid var(--chartreuse);
    transition: border-color 0.3s ease, background 0.3s ease;
}

.method-item:hover {
    border-top-color: var(--mint);
    background: rgba(45, 26, 80, 0.5);
}

.method-icon {
    margin-bottom: 4px;
}

.method-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--chartreuse);
    letter-spacing: 0.15em;
}

.method-desc {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ── Code Terminal ───────────────────────────────────────── */
.code-panel {
    background: rgba(13, 6, 24, 0.8);
}

.code-terminal {
    background: var(--darkest);
    border: 1px solid rgba(200, 245, 59, 0.15);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 24px;
    position: relative;
}

.terminal-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(45, 26, 80, 0.8);
    border-bottom: 1px solid rgba(200, 245, 59, 0.1);
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.td-r { background: var(--glitch-red); opacity: 0.8; }
.td-y { background: #ffb627; opacity: 0.8; }
.td-g { background: var(--mint); opacity: 0.8; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: 8px;
}

.terminal-body {
    padding: 24px 20px;
}

.code-line {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 4px 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.code-line--highlight {
    background: rgba(200, 245, 59, 0.06);
    margin: 0 -20px;
    padding: 4px 20px;
    border-left: 2px solid var(--chartreuse);
}

.code-line--output {
    opacity: 0.5;
    margin-top: 8px;
}

.ln {
    color: rgba(200, 245, 59, 0.25);
    font-size: 0.7rem;
    min-width: 20px;
    text-align: right;
    user-select: none;
}

.code-indent { display: inline-block; width: 24px; }
.code-kw { color: #c792ea; }
.code-fn { color: var(--mint); }
.code-op { color: rgba(232, 244, 200, 0.5); }
.code-param { color: #f07178; }
.code-var { color: var(--cream); }
.code-str { color: var(--chartreuse); }
.code-output { color: rgba(200, 245, 59, 0.4); font-style: italic; }

.code-annotation {
    font-size: 0.72rem;
    color: rgba(0, 255, 180, 0.5);
    font-style: italic;
    margin-left: 8px;
}

.code-annotation--hot {
    color: var(--chartreuse);
    opacity: 0.8;
}

#cursor-blink {
    display: inline-block;
    width: 8px;
    height: 14px;
    background: var(--chartreuse);
    margin-left: 8px;
    animation: cursorBlink 1.2s step-end infinite;
    vertical-align: text-bottom;
    position: absolute;
    bottom: 24px;
    left: 84px;
}

@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ── Annotation Callout ──────────────────────────────────── */
.annotation-side {
    margin-top: 0;
}

.annotation-callout {
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background: rgba(200, 245, 59, 0.05);
    border: 1px solid rgba(200, 245, 59, 0.15);
    border-left: 3px solid var(--chartreuse);
}

.callout-marker {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--chartreuse);
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

.annotation-callout p {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ── Frequency Grid ──────────────────────────────────────── */
.freq-grid {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.freq-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(200, 245, 59, 0.06);
    transition: border-color 0.3s ease;
    position: relative;
}

.freq-item:hover {
    border-bottom-color: rgba(200, 245, 59, 0.2);
}

.freq-item:hover .freq-fill {
    background: linear-gradient(90deg, var(--mint), var(--chartreuse));
    box-shadow: 0 0 8px var(--chartreuse);
}

.freq-bar {
    grid-column: 1;
    height: 4px;
    background: rgba(200, 245, 59, 0.1);
    border-radius: 2px;
    overflow: hidden;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 100px;
    height: 2px;
}

.freq-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--mint) 0%, var(--chartreuse) 100%);
    border-radius: 2px;
    transition: width 1s ease, background 0.3s ease;
    width: 0; /* animated in via JS */
}

.freq-label {
    font-family: var(--font-accent);
    font-size: 0.95rem;
    color: var(--text-primary);
    grid-column: 1;
    padding-bottom: 8px;
}

.freq-hz {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--chartreuse);
    opacity: 0.6;
    grid-column: 3;
    white-space: nowrap;
}

/* ── Duotone Visual Feature ──────────────────────────────── */
.visual-feature {
    background: radial-gradient(ellipse 60% 50% at 70% 50%, rgba(45, 26, 80, 0.5) 0%, transparent 70%);
}

.duotone-display {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.duotone-frame {
    position: relative;
    width: 100%;
    max-width: 500px;
    height: 300px;
    overflow: hidden;
    border: 1px solid rgba(200, 245, 59, 0.2);
}

.duotone-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.duotone-shadow {
    background: var(--darkest);
}

.duotone-primary {
    background: linear-gradient(135deg, rgba(45, 26, 80, 0.9) 0%, rgba(13, 6, 24, 0.7) 100%);
}

.duotone-highlight {
    background:
        radial-gradient(circle at 30% 40%, rgba(200, 245, 59, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, rgba(0, 255, 180, 0.08) 0%, transparent 50%),
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 8px,
            rgba(200, 245, 59, 0.03) 8px,
            rgba(200, 245, 59, 0.03) 9px
        );
}

.duotone-scan {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--chartreuse), transparent);
    opacity: 0.6;
    animation: duotoneScan 3s ease-in-out infinite;
}

@keyframes duotoneScan {
    0% { top: 0; opacity: 0; }
    10% { opacity: 0.8; }
    90% { opacity: 0.8; }
    100% { top: 100%; opacity: 0; }
}

.duotone-text-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 2;
}

.overlay-line {
    display: block;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 0.85rem;
    color: rgba(200, 245, 59, 0.4);
    letter-spacing: 0.3em;
    line-height: 1.3;
}

.overlay-line--large {
    font-size: 2.5rem;
    color: rgba(200, 245, 59, 0.8);
    letter-spacing: 0.1em;
    text-shadow: 0 0 20px rgba(200, 245, 59, 0.4);
}

.duotone-caption {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* ── Resolve Scene ───────────────────────────────────────── */
.resolve-scene {
    background: radial-gradient(ellipse 80% 70% at 50% 50%, rgba(45, 26, 80, 0.4) 0%, transparent 70%);
}

.resolve-heading {
    color: var(--chartreuse);
    text-shadow: 0 0 30px rgba(200, 245, 59, 0.3);
}

.resolve-status {
    margin: 32px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.status-row {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 12px 16px;
    background: rgba(26, 10, 46, 0.5);
    border-left: 2px solid rgba(200, 245, 59, 0.2);
}

.status-key {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    min-width: 160px;
}

.status-val {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--cream);
}

.status-val--good {
    color: var(--mint);
    text-shadow: 0 0 8px rgba(0, 255, 180, 0.4);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ── CTA Block ───────────────────────────────────────────── */
.cta-block {
    margin-top: 40px;
}

.cta-btn {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    padding: 20px 36px;
    background: linear-gradient(135deg, var(--chartreuse) 0%, rgba(200, 245, 59, 0.8) 100%);
    color: var(--darkest);
    text-decoration: none;
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(200, 245, 59, 0.3);
}

.cta-btn:hover::before {
    left: 100%;
}

.cta-btn-text {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.1em;
    display: block;
}

.cta-btn-sub {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    opacity: 0.7;
    display: block;
}

/* ── Footer ──────────────────────────────────────────────── */
#footer {
    background: var(--darkest);
    border-top: 1px solid rgba(200, 245, 59, 0.08);
    padding: 40px 6vw 24px;
    position: relative;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand {
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--chartreuse);
    letter-spacing: -0.02em;
}

.footer-sig {
    font-size: 0.7rem;
    opacity: 0.4;
}

.footer-right {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

.footer-freq {
    display: block;
}

.footer-wave {
    margin-top: 24px;
    opacity: 0.3;
}

.footer-wave svg {
    display: block;
    width: 100%;
    height: 40px;
}

/* ── Glitch Burst Overlay ────────────────────────────────── */
.glitch-burst {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
}

.glitch-burst.active {
    animation: burstGlitch 0.15s steps(1) forwards;
}

@keyframes burstGlitch {
    0% { opacity: 0; }
    20% {
        opacity: 1;
        background: linear-gradient(
            to right,
            transparent 0%, transparent 30%,
            rgba(255, 0, 80, 0.05) 30%, rgba(255, 0, 80, 0.05) 31%,
            transparent 31%
        );
        transform: translateX(-3px);
    }
    40% {
        background: linear-gradient(
            to right,
            transparent 0%, transparent 55%,
            rgba(0, 255, 180, 0.04) 55%, rgba(0, 255, 180, 0.04) 57%,
            transparent 57%
        );
        transform: translateX(3px);
    }
    60% {
        background: linear-gradient(
            to right,
            transparent 0%, transparent 70%,
            rgba(255, 0, 80, 0.06) 70%, rgba(255, 0, 80, 0.06) 72%,
            transparent 72%
        );
        transform: translateX(-1px);
    }
    100% { opacity: 0; transform: translateX(0); }
}

/* ── Intersection Observer — Visible class ───────────────── */
.packet-offset {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.packet-offset.visible {
    opacity: 1;
    transform: translateY(0);
}

/* For packet--right, slide from right */
.packet--right .packet-offset {
    transform: translateX(30px);
}

.packet--right .packet-offset.visible {
    transform: translateX(0);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
    .packet--left .packet-offset,
    .packet--right .packet-offset,
    .packet--center .packet-offset {
        margin-left: 4vw;
        margin-right: 4vw;
    }

    .method-grid {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    #hero {
        padding-left: 4vw;
        padding-right: 4vw;
    }
}