/* sections.css — New layout styles for rebuilt index.html */
/* Complements core-layout.css (which has: hero-skim, ascii-monogram, case-card,
   game-card, footer, nav, theme toggle, lab-log, time-status, diagnostics) */

/* ═══════════════════════════════════════════
   GLOBAL — Beat core-layout.css body gradient
   core-layout.css sets a gradient from surface-primary → surface-secondary
   which creates a visible seam in dark mode. Flatten it.
   ═══════════════════════════════════════════ */
body {
    background: var(--surface-primary) !important;
}

/* Override core-layout.css user-select: none — allow text selection on content */
.hero-copy,
.case-sentence,
.memo-section,
.case-page,
.case-card {
    -webkit-user-select: text;
    user-select: text;
}

/* ═══════════════════════════════════════════
   HERO — Full viewport, product thesis layout
   ═══════════════════════════════════════════ */

/* Override core-layout.css hero — RR monogram only, full viewport */
.hero-skim {
    height: 100vh;
    height: 100dvh;
    min-height: 500px;
    max-height: none;
    margin-bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Cursor inline with final RR line */
.ascii-monogram {
    display: inline-flex;
    align-items: flex-end;
    position: relative;
    z-index: 10;
}

.ascii-monogram .ascii-art-hero {
    display: inline-block;
}

.ascii-monogram .terminal-cursor {
    align-self: flex-end;
    margin-bottom: 0.15em;
}

/* ═══════════════════════════════════════════
   COLOR OVERRIDES — beat core-layout.css
   core-layout.css has: .ascii-monogram base glow,
   [data-cyber-theme] .ascii-monogram theme overrides,
   .cycle-* glitch glow, .terminal-cursor primary accent.
   We override ALL of them here with correct specificity.
   ═══════════════════════════════════════════ */

/* RR monogram — primary accent, razor sharp, whisper glow */
.ascii-monogram,
[data-cyber-theme] .ascii-monogram {
    color: var(--time-primary);
    text-shadow: 0 0 1px currentColor;
}

/* Cursor — secondary accent rectangle with expressive snake face */
.terminal-cursor {
    background: var(--time-secondary) !important;
    width: 0.75em;
    height: 1.15em;
    position: relative;
    border-radius: 2px;
    overflow: visible;
}

/* Snake eyes — two googly circles via radial-gradient.
   Wide pseudo-element spans both eye positions.
   Each eye: white sclera circle + dark pupil circle. */
.terminal-cursor::before {
    content: '';
    position: absolute;
    top: 0.14em;
    left: 0.06em;
    width: 0.62em;
    height: 0.24em;
    border: none;
    border-radius: 0;
    background:
        radial-gradient(circle, #111 36%, transparent 38%)
            0.04em 0.06em / 0.1em 0.1em no-repeat,
        radial-gradient(circle, #111 36%, transparent 38%)
            0.4em 0.06em / 0.1em 0.1em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0em 0em / 0.22em 0.22em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0.36em 0em / 0.22em 0.22em no-repeat;
    box-shadow: none;
    z-index: 1;
}

/* Snake fangs — flush vampire teeth extending from bottom edge */
.terminal-cursor::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 0.22em;
    background: inherit;
    clip-path: polygon(
        0% 0%,
        15% 0%, 25% 100%, 35% 0%,
        65% 0%, 75% 100%, 85% 0%,
        100% 0%, 100% 0%, 0% 0%
    );
    transform: translateY(100%);
}

/* ═══════════════════════════════════════════
   CURSOR MOODS — Time-of-day expressions
   ═══════════════════════════════════════════ */

/* Sleepy (dawn) — half-lidded eyes, small fangs */
.terminal-cursor[data-cursor-mood="sleepy"]::before {
    clip-path: inset(35% 0 0 0);
}
.terminal-cursor[data-cursor-mood="sleepy"]::after {
    height: 0.14em;
}

/* Alert (morning) — normal eyes, modest fangs */
.terminal-cursor[data-cursor-mood="alert"]::after {
    height: 0.18em;
}

/* Fierce (midday) — wide eyes, prominent fangs */
.terminal-cursor[data-cursor-mood="fierce"]::before {
    height: 0.28em;
    background:
        radial-gradient(circle, #111 36%, transparent 38%)
            0.04em 0.07em / 0.12em 0.12em no-repeat,
        radial-gradient(circle, #111 36%, transparent 38%)
            0.4em 0.07em / 0.12em 0.12em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0em 0em / 0.26em 0.26em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0.34em 0em / 0.26em 0.26em no-repeat;
}
.terminal-cursor[data-cursor-mood="fierce"]::after {
    height: 0.26em;
}

/* Cool (afternoon) — slightly narrowed eyes */
.terminal-cursor[data-cursor-mood="cool"]::before {
    clip-path: inset(18% 0 10% 0);
}

/* Hungry (evening) — large eyes, large fangs */
.terminal-cursor[data-cursor-mood="hungry"]::before {
    top: 0.1em;
    height: 0.3em;
    background:
        radial-gradient(circle, #111 36%, transparent 38%)
            0.04em 0.08em / 0.13em 0.13em no-repeat,
        radial-gradient(circle, #111 36%, transparent 38%)
            0.4em 0.08em / 0.13em 0.13em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0em 0em / 0.28em 0.28em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0.34em 0em / 0.28em 0.28em no-repeat;
}
.terminal-cursor[data-cursor-mood="hungry"]::after {
    height: 0.28em;
}

/* Feral (night) — glowing eyes, maximum fangs */
.terminal-cursor[data-cursor-mood="feral"]::before {
    height: 0.28em;
    background:
        radial-gradient(circle, #111 36%, transparent 38%)
            0.04em 0.07em / 0.12em 0.12em no-repeat,
        radial-gradient(circle, #111 36%, transparent 38%)
            0.4em 0.07em / 0.12em 0.12em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0em 0em / 0.26em 0.26em no-repeat,
        radial-gradient(circle, #fff 44%, transparent 46%)
            0.34em 0em / 0.26em 0.26em no-repeat;
    filter: drop-shadow(0 0 4px var(--time-primary));
}
.terminal-cursor[data-cursor-mood="feral"]::after {
    height: 0.32em;
}

/* Glitch cycle classes — muted lux, matching monogram */
.cycle-rose   { color: #c47a8a; text-shadow: 0 0 1px currentColor; }
.cycle-slate  { color: #7a9ab5; text-shadow: 0 0 1px currentColor; }
.cycle-gold   { color: #b89a5a; text-shadow: 0 0 1px currentColor; }
.cycle-sage   { color: #7aaa8a; text-shadow: 0 0 1px currentColor; }
.cycle-teal   { color: #6a9a96; text-shadow: 0 0 1px currentColor; }

/* Light mode: darkened variants, zero glow */
[data-theme="light"] .ascii-monogram,
[data-theme="light"] [data-cyber-theme] .ascii-monogram {
    color: var(--time-primary-light);
    text-shadow: none;
}
[data-theme="light"] .terminal-cursor {
    background: var(--time-secondary-light) !important;
}

[data-theme="light"] .cycle-rose   { color: hsl(345, 40%, 40%); text-shadow: none; }
[data-theme="light"] .cycle-slate  { color: hsl(210, 35%, 38%); text-shadow: none; }
[data-theme="light"] .cycle-gold   { color: hsl(40, 45%, 38%);  text-shadow: none; }
[data-theme="light"] .cycle-sage   { color: hsl(150, 35%, 32%); text-shadow: none; }
[data-theme="light"] .cycle-teal   { color: hsl(175, 30%, 35%); text-shadow: none; }


/* ═══════════════════════════════════════════
   THESIS — Copy section below the hero
   ═══════════════════════════════════════════ */

.thesis-section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-2xl, 3rem) var(--safe-inline, 1.5rem) var(--space-lg, 1.5rem);
}

.hero-copy {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    text-align: center;
    max-width: 720px;
    width: 100%;
}

/* .hero-kicker removed from HTML — style kept minimal for legacy */
.hero-kicker {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin: 0;
}

.hero-title {
    font-family: var(--cyber-font-display, var(--cyber-font-ui));
    font-size: clamp(1.6rem, 4.5vw, var(--text-3xl));
    line-height: 1.15;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    max-width: 18ch;
}

.hero-subhead {
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
    max-width: 48ch;
}

.hero-proof {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.proof-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: var(--chip-bg);
    border: var(--chip-border);
    border-radius: var(--chip-radius);
    padding: 0.3rem 0.75rem;
    font-family: var(--cyber-font-mono);
    font-size: var(--chip-font-size);
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    white-space: nowrap;
}

.proof-chip a {
    color: inherit;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 2px;
}

.proof-chip a:hover {
    color: var(--cyber-primary-accent);
}

.hero-cta-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

/* ═══════════════════════════════════════════
   BUTTONS — Primary + Ghost
   ═══════════════════════════════════════════ */

.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--btn-font);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    padding: 0.65rem 1.5rem;
    border-radius: var(--btn-radius);
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 44px;
    min-width: 44px;
}

.btn-primary {
    background: var(--btn-primary-bg);
    color: var(--btn-primary-color);
    border: 2px solid var(--btn-primary-bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 255, 157, 0.4);
}

.btn-ghost {
    background: var(--btn-ghost-bg);
    color: var(--btn-ghost-color);
    border: var(--btn-ghost-border);
}

.btn-ghost:hover {
    background: rgba(0, 255, 157, 0.08);
    transform: translateY(-1px);
}

[data-theme="light"] .btn-primary {
    box-shadow: 0 2px 8px rgba(0, 128, 0, 0.15);
}

[data-theme="light"] .btn-ghost {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

[data-theme="light"] .btn-ghost:hover {
    background: rgba(0, 128, 0, 0.06);
    border-color: var(--cyber-primary-accent);
    color: var(--cyber-primary-accent);
}

/* ═══════════════════════════════════════════
   CASE STUDIES — 2-card grid + card overrides
   ═══════════════════════════════════════════ */

.case-studies-grid--two {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 767px) {
    .case-studies-grid--two {
        grid-template-columns: 1fr;
    }
}

/* Override core-layout.css card (kill green glow, seamless BG) */
.case-card {
    gap: var(--space-md);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: border-color 0.25s ease;
}

.case-card:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--time-primary);
}

[data-theme="light"] .case-card {
    background: transparent;
    border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .case-card:hover {
    border-color: var(--time-primary-light);
}

/* ASCII art header in card */
.card-ascii {
    margin-bottom: var(--space-xs);
}

.card-ascii-art {
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: clamp(0.7rem, 1.4vw, 0.9rem);
    line-height: 1.15;
    color: var(--cyber-primary-accent);
    text-shadow: 0 0 1px currentColor;
    white-space: pre;
    margin: 0;
    transition: color 0.15s ease;
}

.case-card:hover .card-ascii-art {
    color: var(--time-primary);
}

[data-theme="light"] .card-ascii-art {
    text-shadow: none;
    color: var(--time-primary-light);
}

/* Impact metric line */
.ascii-impact {
    color: var(--cyber-secondary-accent) !important;
    opacity: 0.7;
}

/* Single sentence — the bet */
.case-sentence {
    font-size: var(--text-sm);
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
    max-width: 38ch;
}

.case-sentence a {
    color: inherit;
    text-decoration: underline;
    text-decoration-style: dotted;
    text-underline-offset: 2px;
}

.case-sentence a:hover {
    color: var(--cyber-primary-accent);
}

/* Card-level proof chips */
.card-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

/* Card link */
.case-card .case-link {
    display: inline-block;
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    color: var(--cyber-primary-accent);
    text-decoration: none;
    letter-spacing: 0.04em;
    transition: color 0.2s ease;
    margin-top: auto;
}

.case-card .case-link:hover {
    text-decoration: underline;
}

/* ═══════════════════════════════════════════
   SNAKE SECTION — Single game, product-framed
   ═══════════════════════════════════════════ */

.snake-section {
    max-width: 720px;
    margin: var(--space-3xl) auto 0;
    padding: var(--space-2xl);
    background: transparent;
    padding-left: calc(var(--space-2xl) + env(safe-area-inset-left));
    padding-right: calc(var(--space-2xl) + env(safe-area-inset-right));
    text-align: center;
}

.lab-log-console {
    display: none;
}

/* Footer — transparent BG to eliminate dark mode seam from --surface-secondary */
.cyber-footer {
    background: transparent;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

[data-theme="light"] .cyber-footer {
    border-top-color: rgba(0, 0, 0, 0.06);
}

.snake-section .section-head {
    margin-bottom: var(--space-xl);
}

.snake-section .section-head h2 {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-lg);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin: 0 0 var(--space-sm) 0;
}

.snake-section .section-head p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    max-width: 48ch;
    margin: 0 auto;
    line-height: 1.6;
}

/* ── Inline game surface ── */
.snake-surface {
    max-width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* Stats bar */
.snake-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.25);
    font-family: var(--cyber-font-mono);
    text-align: center;
}

.snake-stats .stat-label {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.15rem;
}

.snake-stats .stat-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--time-primary, var(--cyber-primary-accent));
}

[data-theme="light"] .snake-stats {
    border-color: rgba(0, 0, 0, 0.1);
    background: #f5f5f7;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .snake-stats .stat-value {
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

/* Board wrapper — responsive square */
.snake-board-wrapper {
    display: flex;
    justify-content: center;
}

.snake-board {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid var(--time-primary, var(--cyber-primary-accent));
    background: #0a0a0a;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.snake-board:focus-visible {
    outline: 2px solid var(--time-primary, var(--cyber-primary-accent));
    outline-offset: 3px;
}

[data-theme="light"] .snake-board {
    border-color: var(--time-primary-light, var(--cyber-primary-accent));
    background: #111;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.12), 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* Canvas fills board */
.snake-board .cyber-game-canvas {
    border: none;
    border-radius: 10px;
    box-shadow: none;
    width: 100% !important;
    height: 100% !important;
}

/* Start / pause button */
.snake-start-btn {
    width: 100%;
    padding: 0.75rem 1.5rem;
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: 1px solid var(--time-primary, var(--cyber-primary-accent));
    border-radius: 10px;
    background: transparent;
    color: var(--time-primary, var(--cyber-primary-accent));
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
    min-height: 48px;
}

.snake-start-btn:hover {
    background: var(--time-primary, var(--cyber-primary-accent));
    color: #000;
}

[data-theme="light"] .snake-start-btn {
    border-color: var(--time-primary-light, var(--cyber-primary-accent));
    color: var(--time-primary-light, var(--cyber-primary-accent));
    background: #f5f5f7;
}

[data-theme="light"] .snake-start-btn:hover {
    background: var(--time-primary-light, var(--cyber-primary-accent));
    color: #fff;
}

.snake-start-btn:focus-visible {
    outline: 2px solid var(--time-primary);
    outline-offset: 2px;
}

/* ── Touch D-pad ── visible only on coarse pointer (touch) */
.snake-touch-dpad {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
}

@media (pointer: coarse) {
    .snake-touch-dpad {
        display: flex;
    }
}

.dpad-row {
    display: flex;
    justify-content: center;
    gap: 0.35rem;
}

.dpad-row-mid {
    gap: 0.35rem;
}

.dpad-btn {
    width: 52px;
    height: 52px;
    border: 2px solid var(--time-primary, var(--cyber-primary-accent));
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.3);
    color: var(--time-primary, var(--cyber-primary-accent));
    font-size: 1.3rem;
    font-family: var(--cyber-font-mono);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, transform 0.1s ease;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.dpad-btn:active,
.dpad-btn.dpad-active {
    background: var(--time-primary, var(--cyber-primary-accent));
    color: #000;
    transform: scale(0.92);
}

.dpad-boost {
    font-size: 1.1rem;
    background: rgba(255, 170, 0, 0.1);
    border-color: var(--cyber-warning, #ffaa00);
    color: var(--cyber-warning, #ffaa00);
}

.dpad-boost:active,
.dpad-boost.dpad-active {
    background: var(--cyber-warning, #ffaa00);
    color: #000;
}

[data-theme="light"] .dpad-btn {
    background: #f5f5f7;
    border-color: var(--time-primary-light, var(--cyber-primary-accent));
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

[data-theme="light"] .dpad-boost {
    background: #fff8e1;
    border-color: #e6a000;
    color: #e6a000;
}

/* ── Leaderboard ── */
.snake-leaderboard {
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: var(--space-md) var(--space-md) var(--space-sm);
    background: rgba(0, 0, 0, 0.2);
}

.snake-leaderboard h4 {
    font-family: var(--cyber-font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--time-primary, var(--cyber-primary-accent));
    margin: 0 0 var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: var(--space-xs);
}

.snake-leaderboard-empty {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin: 0;
    font-style: italic;
}

.snake-lb-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.snake-lb-row {
    display: grid;
    grid-template-columns: 1.5rem 3rem 1fr auto;
    gap: 0.5rem;
    align-items: center;
    padding: 0.4rem 0.5rem;
    border-radius: 8px;
    font-family: var(--cyber-font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
}

.snake-lb-row:first-child {
    background: rgba(255, 215, 0, 0.06);
}

.snake-lb-current {
    border: 1px solid var(--time-primary, var(--cyber-primary-accent));
    background: rgba(var(--time-primary), 0.06) !important;
}

.snake-lb-rank {
    font-weight: 700;
    color: var(--text-secondary);
}

.snake-lb-initials {
    font-weight: 600;
    color: var(--time-primary, var(--cyber-primary-accent));
    text-transform: uppercase;
}

.snake-lb-score {
    font-weight: 700;
}

.snake-lb-meta {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: right;
}

[data-theme="light"] .snake-leaderboard {
    border-color: rgba(0, 0, 0, 0.1);
    background: #f5f5f7;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .snake-leaderboard h4 {
    color: var(--time-primary-light, var(--cyber-primary-accent));
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .snake-lb-row {
    background: #fff;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .snake-lb-row:first-child {
    background: #fffde7;
}

[data-theme="light"] .snake-lb-initials {
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

/* ── Initials prompt ── */
.snake-initials-prompt {
    border: 1px solid var(--time-primary, var(--cyber-primary-accent));
    border-radius: 12px;
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.35);
    text-align: center;
}

.snake-initials-label {
    display: block;
    font-family: var(--cyber-font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #ffd700;
    margin-bottom: var(--space-sm);
}

.snake-initials-row {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    align-items: center;
}

.snake-initials-slots {
    display: flex;
    gap: 0.35rem;
}

.snake-initials-char {
    width: 2.4rem;
    height: 2.8rem;
    padding: 0;
    font-family: var(--cyber-font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
    line-height: 2.8rem;
    background: rgba(0, 0, 0, 0.6);
    border: 2px solid var(--time-primary, var(--cyber-primary-accent));
    border-radius: 6px;
    color: var(--text-primary);
    outline: none;
    caret-color: transparent;
}

.snake-initials-char:focus {
    border-color: #ffd700;
    box-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
}

.snake-initials-char::placeholder {
    color: var(--text-secondary);
    opacity: 0.4;
}

.snake-initials-save {
    padding: 0.5rem 1rem;
    min-height: 44px;
}

[data-theme="light"] .snake-initials-prompt {
    background: rgba(255, 255, 255, 0.92);
}

[data-theme="light"] .snake-initials-char {
    background: #fff;
    border-color: var(--time-primary-light, var(--cyber-primary-accent));
    color: #000;
}

/* Controls hint */
.snake-controls-hint {
    font-family: var(--cyber-font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin: 0;
}

@media (pointer: coarse) {
    .snake-controls-hint {
        display: none;
    }
}

/* ═══════════════════════════════════════════
   DIP OVERLAY — Kept lightweight
   ═══════════════════════════════════════════ */

.dip-overlay {
    position: fixed;
    inset: 0;
    z-index: 1200;
    background: rgba(0, 0, 0, 0.92);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    display: none;
    overflow-y: auto;
}

.dip-content {
    max-width: 960px;
    margin: 0 auto;
    padding: var(--space-2xl);
    padding-left: calc(var(--space-2xl) + env(safe-area-inset-left));
    padding-right: calc(var(--space-2xl) + env(safe-area-inset-right));
    position: relative;
}

.dip-close {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-emphasis);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1201;
    transition: background 0.2s ease;
}

.dip-close:hover {
    background: var(--cyber-primary-accent);
    color: #000;
}

[data-theme="light"] .dip-overlay {
    background: rgba(255, 255, 255, 0.96);
}

[data-theme="light"] .dip-close {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.12);
    color: var(--text-primary);
}

/* ═══════════════════════════════════════════
   CASE STUDY PAGES — Decision memo structure
   ═══════════════════════════════════════════ */

.case-page {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-2xl);
    padding-left: calc(var(--space-2xl) + env(safe-area-inset-left));
    padding-right: calc(var(--space-2xl) + env(safe-area-inset-right));
}

.case-page-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.06em;
    margin-bottom: var(--space-xl);
    transition: color 0.2s ease;
}

.case-page-back:hover {
    color: var(--cyber-primary-accent);
}

.case-page h1 {
    font-family: var(--cyber-font-mono);
    font-size: clamp(1.2rem, 3vw, var(--text-2xl));
    color: var(--cyber-primary-accent);
    line-height: 1.25;
    margin: 0 0 var(--space-xs) 0;
}

.memo-subtitle {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    letter-spacing: 0.04em;
    margin: 0 0 var(--space-lg) 0;
    line-height: 1.5;
}

.case-page .ascii-section-header {
    font-family: var(--cyber-font-mono);
    font-size: clamp(0.55rem, 1vw, 0.75rem);
    color: var(--cyber-primary-accent);
    white-space: pre;
    margin-bottom: var(--space-xl);
    overflow-x: auto;
}

.memo-section {
    margin-bottom: var(--space-2xl);
}

.memo-section h2 {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--cyber-primary-accent);
    margin: 0 0 var(--space-sm) 0;
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--border-subtle);
}

.memo-section p,
.memo-section li {
    font-size: var(--text-base);
    line-height: var(--base-line-height);
    color: var(--text-primary);
}

.memo-section ul,
.memo-section ol {
    padding-left: 1.5rem;
    margin: 0 0 var(--space-md) 0;
}

.memo-section li {
    margin-bottom: var(--space-xs);
}

.memo-section .option-label {
    font-family: var(--cyber-font-mono);
    font-weight: 600;
    color: var(--cyber-primary-accent);
}

.memo-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-md);
    margin: var(--space-lg) 0;
}

.memo-metric {
    padding: var(--space-md);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    text-align: center;
}

.memo-metric .metric-value {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--cyber-primary-accent);
    display: block;
    margin-bottom: var(--space-xs);
}

.memo-metric .metric-label {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.memo-cite {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-style: italic;
}

.memo-cite a {
    color: var(--cyber-primary-accent);
}

/* Animated ASCII hero — case study pages */
.case-ascii-hero {
    margin: var(--space-2xl) 0;
    text-align: center;
    display: flex;
    justify-content: center;
}

.case-ascii-hero .card-ascii {
    display: block;
}

.case-ascii-hero .card-ascii-art {
    font-family: var(--cyber-font-mono);
    font-size: clamp(0.85rem, 2.2vw, 1.4rem);
    line-height: 1.35;
    color: var(--time-primary, var(--cyber-primary-accent));
    white-space: pre;
    text-align: left;
    display: inline-block;
}

[data-theme="light"] .case-ascii-hero .card-ascii-art {
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

.hero-subhead {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    letter-spacing: 0.04em;
    max-width: 48ch;
    line-height: 1.6;
}

.hero-microcopy {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-xs, 0.75rem);
    color: var(--text-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.6;
}

/* Case page footer */
.case-page-footer {
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.case-page-footer .footer-ascii {
    font-family: var(--cyber-font-mono);
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* ═══════════════════════════════════════════
   RESPONSIVE — Hero adjustments
   ═══════════════════════════════════════════ */

@media (max-width: 640px) {
    .hero-layout {
        gap: var(--space-lg);
    }

    .hero-proof {
        gap: 0.35rem;
    }

    .proof-chip {
        font-size: 0.65rem;
        padding: 0.25rem 0.55rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .hero-cta-row {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-ghost {
        width: 100%;
    }

    .card-ascii-art {
        font-size: clamp(0.55rem, 1.2vw, 0.75rem);
    }

    .case-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .snake-section {
        padding: var(--space-xl) var(--space-md);
    }

    .snake-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .snake-board {
        width: min(95vw, 360px);
    }

    .dpad-btn {
        width: 48px;
        height: 48px;
        font-size: 1.1rem;
    }

    .snake-lb-row {
        grid-template-columns: 1.2rem 2.5rem 1fr auto;
        font-size: 0.75rem;
        gap: 0.3rem;
    }

    .case-page {
        padding: var(--space-xl) var(--space-md);
    }
}

/* Scale cursor on touch devices for visibility */
@media (pointer: coarse) {
    .terminal-cursor {
        width: 0.9em;
        height: 1.35em;
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn-primary:hover,
    .btn-ghost:hover {
        transform: none;
    }
}

/* ═══════════════════════════════════════════
   SCROLL REVEAL — fade-up entrance
   ═══════════════════════════════════════════ */

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.in-view {
    opacity: 1;
    transform: none;
}

.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ═══════════════════════════════════════════
   MONOGRAM — story-mode (refined easter egg)
   ═══════════════════════════════════════════ */

.ascii-monogram.story-mode {
    animation: storyPulse 2s ease-in-out infinite;
}

@keyframes storyPulse {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    .ascii-monogram.story-mode {
        animation: none;
        opacity: 1;
    }
}

/* ═══════════════════════════════════════════
   VIEW TRANSITIONS — progressive crossfade
   ═══════════════════════════════════════════ */

@view-transition {
    navigation: auto;
}

.case-card:nth-child(1) {
    view-transition-name: case-card-1;
}

.case-card:nth-child(2) {
    view-transition-name: case-card-2;
}

.case-page {
    view-transition-name: case-page;
}

/* ═══════════════════════════════════════════
   KEYBOARD SHORTCUT HELP — ? affordance
   ═══════════════════════════════════════════ */

.help-trigger {
    position: fixed;
    bottom: var(--space-md);
    right: var(--space-md);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(0, 0, 0, 0.4);
    color: var(--text-secondary);
    font-family: var(--cyber-font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.3s ease;
}

.help-trigger:hover {
    border-color: var(--time-secondary, var(--cyber-secondary-accent));
    color: var(--time-secondary, var(--cyber-secondary-accent));
}

[data-theme="light"] .help-trigger {
    background: rgba(255, 255, 255, 0.85);
    border-color: rgba(0, 0, 0, 0.1);
    color: var(--text-secondary);
}

[data-theme="light"] .help-trigger:hover {
    border-color: var(--time-secondary-light, var(--cyber-secondary-accent));
    color: var(--time-secondary-light, var(--cyber-secondary-accent));
}

.help-overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--surface-tertiary, #1a1a1a);
    border: 1px solid var(--border-emphasis);
    border-radius: 16px;
    padding: var(--space-xl);
    z-index: 20000;
    max-width: 380px;
    width: min(92vw, 380px);
    font-family: var(--cyber-font-mono);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.65);
}

.help-overlay h3 {
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--time-primary, var(--cyber-primary-accent));
    margin: 0 0 var(--space-md) 0;
}

.help-overlay dl {
    margin: 0;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.4rem 1rem;
    font-size: 0.8rem;
}

.help-overlay dt {
    color: var(--time-secondary, var(--cyber-secondary-accent));
    font-weight: 600;
    white-space: nowrap;
}

.help-overlay dd {
    margin: 0;
    color: var(--text-secondary);
}

.help-overlay button {
    margin-top: var(--space-md);
    width: 100%;
    padding: 0.6rem;
    border: none;
    border-radius: 999px;
    background: var(--time-primary, var(--cyber-primary-accent));
    color: #000;
    font-weight: 600;
    font-family: var(--cyber-font-mono);
    font-size: 0.8rem;
    cursor: pointer;
}

[data-theme="light"] .help-overlay {
    background: #fff;
    border-color: rgba(0, 0, 0, 0.1);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .help-overlay h3 {
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

[data-theme="light"] .help-overlay dt {
    color: var(--time-secondary-light, var(--cyber-secondary-accent));
}

[data-theme="light"] .help-overlay button {
    background: var(--time-primary-light, var(--cyber-primary-accent));
    color: #fff;
}

/* ═══════════════════════════════════════════
   404 ERROR PAGE — navigation links
   ═══════════════════════════════════════════ */

.error-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    padding: var(--space-xl) var(--safe-inline, 1.5rem);
}

.error-nav .case-link {
    white-space: nowrap;
}

/* ═══════════════════════════════════════════
   ARTIFACTS PAGE — RR identity grid
   ═══════════════════════════════════════════ */

.artifacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-xl);
    padding: var(--space-xl) var(--safe-inline, 1.5rem) var(--space-3xl);
    max-width: 1200px;
    margin: 0 auto;
}

.artifact-card {
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: var(--space-lg);
    background: rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    transition: border-color 0.2s ease;
}

.artifact-card:hover {
    border-color: var(--time-primary, var(--cyber-primary-accent));
}

[data-theme="light"] .artifact-card {
    border-color: rgba(0, 0, 0, 0.08);
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .artifact-card:hover {
    border-color: var(--time-primary-light, var(--cyber-primary-accent));
}

.artifact-label {
    font-family: var(--cyber-font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--time-primary, var(--cyber-primary-accent));
    margin: 0;
}

[data-theme="light"] .artifact-label {
    color: var(--time-primary-light, var(--cyber-primary-accent));
}

.artifact-preview {
    font-size: clamp(0.55rem, 1.8vw, 0.85rem);
    line-height: 1.15;
    margin: 0;
    padding: var(--space-md);
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    overflow-x: auto;
    white-space: pre;
}

[data-theme="light"] .artifact-preview {
    background: rgba(0, 0, 0, 0.04);
}

.artifact-actions {
    display: flex;
    gap: var(--space-sm);
}

.artifact-actions .btn-ghost {
    flex: 1;
    font-size: 0.7rem;
    padding: 0.4rem 0.6rem;
}

/* Swatch picker */
.swatch-picker {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-md);
}

.swatch {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.15s ease;
    background: var(--surface-tertiary, #2a2a2a);
    font-size: 0;
    padding: 0;
}

.swatch[data-color="auto"] {
    font-size: 1rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.swatch:not([data-color="auto"]) {
    background-color: attr(data-color);
}

.swatch[data-color="#c47a8a"] { background-color: #c47a8a; }
.swatch[data-color="#b89a5a"] { background-color: #b89a5a; }
.swatch[data-color="#7a9ab5"] { background-color: #7a9ab5; }
.swatch[data-color="#7aaa8a"] { background-color: #7aaa8a; }
.swatch[data-color="#6a9a96"] { background-color: #6a9a96; }

.swatch:hover {
    transform: scale(1.15);
}

.swatch--active {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px var(--surface-primary, #000), 0 0 0 4px var(--text-primary);
}

[data-theme="light"] .swatch[data-color="auto"] {
    color: var(--text-secondary);
    background: var(--surface-tertiary, #f0f0f0);
}

.artifact-toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface-tertiary, #2a2a2a);
    border: 1px solid var(--time-primary, var(--cyber-primary-accent));
    border-radius: 8px;
    padding: 0.5rem 1.2rem;
    font-family: var(--cyber-font-mono);
    font-size: 0.8rem;
    color: var(--time-primary, var(--cyber-primary-accent));
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.artifact-toast.visible {
    opacity: 1;
}