/* SPDX-License-Identifier: MPL-2.0
 * Adrift Musician Website — Dark-OLED Studio Design System */

:root {
  color-scheme: dark;
  accent-color: #38D8F8;
  interpolate-size: allow-keywords;

  --bg-void: #070A10;
  --bg-page: #0B0E15;
  --bg-surface: #111622;
  --bg-card: #151B29;
  --bg-card-hover: #1A2234;
  --bg-elevated: #1D2538;

  --border-subtle: rgba(238, 242, 248, 0.09);
  --border-strong: rgba(238, 242, 248, 0.18);

  --text-primary: #EEF2F8;
  --text-secondary: #B0BCD2;
  --text-muted: #8492AD;

  /* Authentic Adrift 6 Voice-Group OLED Palette */
  --g1-gold: #F8BE30;
  --g2-emerald: #40E88C;
  --g3-cyan: #38D8F8;
  --g4-coral: #FC6C56;
  --g5-magenta: #F464C6;
  --g6-violet: #A884FF;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --max-w: 76rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background-color: var(--bg-page);
  background-image:
    radial-gradient(ellipse 68rem 34rem at 50% -6rem, rgba(56, 216, 248, 0.10), transparent 70%),
    radial-gradient(ellipse 46rem 24rem at 15% 8rem, rgba(248, 190, 48, 0.07), transparent 65%),
    radial-gradient(ellipse 46rem 24rem at 85% 10rem, rgba(168, 132, 255, 0.08), transparent 65%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
canvas,
video {
  display: block;
  max-inline-size: 100%;
}

img {
  block-size: auto;
}

h1,
h2,
h3 {
  margin-block: 0 0.65rem;
  line-height: 1.18;
  letter-spacing: -0.02em;
  text-wrap: balance;
  color: var(--text-primary);
}

p,
li {
  text-wrap: pretty;
}

p {
  margin-block: 0 1rem;
  color: var(--text-secondary);
}

code,
kbd {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

kbd {
  display: inline-block;
  padding: 0.12rem 0.42rem;
  border-radius: 0.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.5);
}

a {
  color: var(--g3-cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #7CE5FC;
}

:focus-visible {
  outline: 2px solid var(--g3-cyan);
  outline-offset: 2px;
}

/* Accessibility: Skip Link */
.visually-hidden:where(:not(:focus-within, :active)) {
  clip-path: inset(50%);
  block-size: 1px;
  inline-size: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 999;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--g1-gold);
  color: #080C12;
  font-weight: 700;
  text-decoration: none;
}

.container {
  inline-size: min(100% - 2rem, var(--max-w));
  margin-inline: auto;
}

/* ---- Sticky Top Navbar ---- */

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 50;
  background: rgba(9, 12, 19, 0.84);
  backdrop-filter: blur(14px);
  border-block-end: 1px solid var(--border-subtle);
}

.nav-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.25rem;
  min-block-size: 4rem;
  padding-block: 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  inline-size: 2rem;
  block-size: 2rem;
  border-radius: 0.5rem;
  background: linear-gradient(135deg, var(--g5-magenta), var(--g1-gold), var(--g2-emerald));
  color: #080C12;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.95rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.25rem;
  padding-inline: 0.4rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (max-width: 920px) {
  .site-header nav {
    order: 3;
    flex-basis: 100%;
  }

  .nav-links {
    border-block-start: 1px solid var(--border-subtle);
    padding-block-start: 0.35rem;
  }
}

/* ---- Buttons & Form Controls ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-block-size: 2.35rem;
  min-inline-size: 2.35rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: background-color 140ms ease, border-color 140ms ease, transform 90ms ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--g1-gold);
  color: #080C12;
  border-color: rgba(255, 255, 255, 0.16);
}

.btn-primary:hover:not(:disabled) {
  background: #FFD054;
  color: #080C12;
}

.btn-accent {
  background: var(--g3-cyan);
  color: #071018;
}

.btn-accent:hover:not(:disabled) {
  background: #6BE3FC;
  color: #071018;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
  background: #27324A;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-subtle);
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
}

input[type="search"],
input[type="text"],
select {
  min-block-size: 2.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
}

@media (pointer: coarse) {
  .btn,
  .nav-links a,
  .preset-pill,
  .subpage-tab,
  .control-select-btn,
  input[type="search"],
  select {
    min-block-size: 2.75rem;
    min-inline-size: 2.75rem;
  }
}

/* ---- Sections & Typography ---- */

section {
  padding-block: 3.75rem;
  border-block-end: 1px solid var(--border-subtle);
}

.section-header {
  max-inline-size: 46rem;
  margin-block-end: 2rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-block-end: 0.6rem;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  background: rgba(56, 216, 248, 0.10);
  border: 1px solid rgba(56, 216, 248, 0.28);
  color: var(--g3-cyan);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section-header h2 {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
}

/* ---- Hero & Live FM-1 Emulator ---- */

.hero-section {
  padding-block: 2.25rem 3.5rem;
}

.hero-intro {
  display: grid;
  gap: 1.25rem;
  margin-block-end: 1.5rem;
}

@media (min-width: 58rem) {
  .hero-intro {
    grid-template-columns: 1.35fr 0.85fr;
    align-items: end;
  }
}

.hero-intro h1 {
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  letter-spacing: -0.03em;
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--text-secondary);
  margin-block-end: 0;
}

.hero-cta-box {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: flex-start;
}

@media (min-width: 58rem) {
  .hero-cta-box {
    justify-content: flex-end;
  }
}

/* Quick Preset Bar above Emulator */
.emu-shell {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}

.emu-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-block-end: 0.75rem;
}

.emu-readout {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--g1-gold);
  background: rgba(248, 190, 48, 0.09);
  border: 1px solid rgba(248, 190, 48, 0.25);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
}

.quick-presets-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-block-end: 0.85rem;
}

.preset-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  min-block-size: 2rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  touch-action: manipulation;
}

.preset-pill:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.preset-pill[aria-pressed="true"] {
  background: rgba(248, 190, 48, 0.16);
  border-color: var(--g1-gold);
  color: var(--text-primary);
}

.pill-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--g1-gold);
}

.canvas-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #080C12;
  border: 1px solid rgba(255, 255, 255, 0.07);
}

#fm1-canvas {
  inline-size: 100%;
  aspect-ratio: 1280 / 800;
  cursor: pointer;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.emu-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-block-start: 0.9rem;
  padding-block-start: 0.85rem;
  border-block-start: 1px solid var(--border-subtle);
}

.emu-toolbar-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}

#btn-audio-toggle[data-state="live"] {
  background: rgba(64, 232, 140, 0.16);
  border-color: var(--g2-emerald);
  color: var(--g2-emerald);
}

#btn-audio-toggle[data-state="muted"] {
  background: rgba(252, 108, 86, 0.16);
  border-color: var(--g4-coral);
  color: var(--g4-coral);
}

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  min-block-size: 2.25rem;
  padding-inline: 0.4rem;
  font-size: 0.86rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.user-bank-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1rem;
  margin-block-start: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  background: rgba(8, 12, 18, 0.65);
  border: 1px solid var(--border-subtle);
  font-size: 0.85rem;
}

.user-bank-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.user-bank-count {
  font-family: var(--font-mono);
  color: var(--g2-emerald);
}

.file-btn-label {
  position: relative;
  overflow: hidden;
}

.file-btn-label input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ---- Direct Browser Firmware Flasher Section ---- */

.install-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 58rem) {
  .install-grid {
    grid-template-columns: 1fr 1.15fr;
    align-items: start;
  }
}

.steps-card,
.flasher-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.flasher-card {
  border-color: rgba(56, 216, 248, 0.28);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.step-list li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.85rem;
  align-items: start;
}

.step-num {
  display: inline-grid;
  place-items: center;
  inline-size: 2rem;
  block-size: 2rem;
  border-radius: 999px;
  background: rgba(248, 190, 48, 0.16);
  border: 1px solid var(--g1-gold);
  color: var(--g1-gold);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
}

.step-list strong {
  display: block;
  color: var(--text-primary);
  margin-block-end: 0.15rem;
}

.step-list p {
  margin: 0;
  font-size: 0.93rem;
}

.support-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-block-end: 1rem;
}

.support-pill[data-status="ok"] {
  background: rgba(64, 232, 140, 0.12);
  border: 1px solid rgba(64, 232, 140, 0.35);
  color: var(--g2-emerald);
}

.support-pill[data-status="warn"] {
  background: rgba(248, 190, 48, 0.14);
  border: 1px solid rgba(248, 190, 48, 0.38);
  color: var(--g1-gold);
}

.flasher-port-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-block-end: 1rem;
}

.flasher-port-row select {
  flex: 1 1 14rem;
}

.flasher-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-block-end: 1rem;
}

.flasher-cta-row .btn-primary {
  flex: 1 1 15rem;
  font-size: 1rem;
  padding-block: 0.7rem;
}

.fw-meta-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-block-end: 1rem;
}

.flash-console {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-md);
  background: #090C13;
  border: 1px solid var(--border-subtle);
}

.flash-headline {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-block-end: 0.45rem;
}

.flash-headline[data-state="ok"] {
  color: var(--g2-emerald);
}

.flash-headline[data-state="working"] {
  color: var(--g3-cyan);
}

.flash-headline[data-state="error"] {
  color: var(--g4-coral);
}

.flash-progress-wrap {
  margin-block: 0.55rem;
}

.flash-progress-wrap progress {
  inline-size: 100%;
  block-size: 0.65rem;
  border-radius: 999px;
}

@supports not (accent-color: #38D8F8) {
  .flash-progress-wrap progress {
    background-color: var(--bg-elevated);
    color: var(--g3-cyan);
  }
}

.flash-log {
  margin: 0.45rem 0 0;
  padding-inline-start: 1.15rem;
  max-block-size: 8.5rem;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.flash-log:empty {
  display: none;
}

/* ---- Accordions (<details> + <summary>) ---- */

.disclosure-stack {
  display: grid;
  gap: 0.75rem;
  margin-block-start: 1.25rem;
}

details.accordion {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: clip;
}

details.accordion > summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.9rem 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
}

details.accordion > summary::-webkit-details-marker {
  display: none;
}

details.accordion > summary::before {
  content: "";
  flex: 0 0 0.6rem;
  inline-size: 0.6rem;
  block-size: 0.6rem;
  border-inline-end: 2px solid var(--g3-cyan);
  border-block-end: 2px solid var(--g3-cyan);
  transform: rotate(-45deg);
  transition: transform 180ms ease;
}

details.accordion[open] > summary::before {
  transform: rotate(45deg);
}

details.accordion > summary:hover {
  background: rgba(255, 255, 255, 0.03);
}

details.accordion::details-content {
  block-size: 0;
  overflow: clip;
  contain: layout;
}

details.accordion[open]::details-content {
  block-size: auto;
}

@media (prefers-reduced-motion: no-preference) {
  details.accordion::details-content {
    transition: block-size 220ms ease, content-visibility 220ms ease;
    transition-behavior: allow-discrete;
  }
}

.accordion-body {
  padding: 0 1.15rem 1.15rem;
  border-block-start: 1px solid var(--border-subtle);
  padding-block-start: 1rem;
}

.custom-fw-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-block-start: 0.75rem;
}

/* ---- Sound Architecture & 6 Voice Groups ---- */

.signal-flow-grid {
  display: grid;
  gap: 1.1rem;
  margin-block-end: 2.25rem;
}

@media (min-width: 54rem) {
  .signal-flow-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.stage-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
}

.stage-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 0.35rem;
  margin-block-end: 0.75rem;
}

.stage-card h3 {
  font-size: 1.2rem;
}

.stage-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 0;
  padding: 0;
  list-style: none;
}

.stage-tags li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 0.35rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.groups-showcase {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.group-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.65rem;
  margin-block: 1.1rem 1.35rem;
  padding: 0;
  list-style: none;
}

.group-swatch {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.swatch-pip {
  inline-size: 0.85rem;
  block-size: 0.85rem;
  border-radius: 999px;
  flex-shrink: 0;
}

.group-swatch strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.group-swatch span {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.modes-trio {
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 50rem) {
  .modes-trio {
    grid-template-columns: repeat(3, 1fr);
  }
}

.mode-box {
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
}

.mode-box h4 {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text-primary);
}

.mode-box p {
  margin: 0;
  font-size: 0.88rem;
}

/* ---- Interactive Control & OLED Screen Explorer ---- */

.explorer-shell {
  container-type: inline-size;
}

.explorer-layout {
  display: grid;
  gap: 1.5rem;
}

@container (min-width: 52rem) {
  .explorer-layout {
    grid-template-columns: 19.5rem 1fr;
    align-items: start;
  }
}

.control-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.42rem;
}

.control-select-btn {
  inline-size: 100%;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
}

.control-select-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.control-select-btn[aria-pressed="true"] {
  background: var(--bg-elevated);
  border-color: var(--g3-cyan);
}

.cs-dot {
  inline-size: 0.65rem;
  block-size: 0.65rem;
  border-radius: 999px;
  flex-shrink: 0;
}

.cs-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.cs-text strong {
  font-size: 0.88rem;
}

.cs-text small {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.explorer-detail {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 44rem) {
  .explorer-detail {
    grid-template-columns: 17.5rem 1fr;
    align-items: start;
  }
}

.oled-frame {
  background: #06090F;
  padding: 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.oled-frame img {
  inline-size: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 0.25rem;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.oled-caption {
  margin: 0.65rem 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.cg-hw-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-block-end: 0.25rem;
}

.explorer-copy h3 {
  font-size: 1.45rem;
  margin-block-end: 0.65rem;
}

.subpage-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-block: 1rem;
}

.subpage-tab {
  min-block-size: 2.1rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.subpage-tab[aria-pressed="true"] {
  background: rgba(56, 216, 248, 0.16);
  border-color: var(--g3-cyan);
  color: var(--text-primary);
}

.pro-tip-box {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(248, 190, 48, 0.08);
  border-inline-start: 3px solid var(--g1-gold);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ---- 24 Built-In Factory Presets Gallery (CSS Subgrid) ---- */

.presets-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-end: 1.35rem;
}

.preset-cat-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.presets-grid-wrap {
  container-type: inline-size;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16.5rem, 1fr));
  gap: 1rem;
}

.preset-card {
  display: grid;
  grid-row: span 3;
  grid-template-rows: auto 1fr auto;
  grid-template-rows: subgrid;
  gap: 0.75rem;
  padding: 1.15rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: border-color 140ms ease, background-color 140ms ease;
}

.preset-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
}

.preset-card.is-playing {
  border-color: var(--g1-gold);
  box-shadow: 0 0 0 1px rgba(248, 190, 48, 0.35);
}

.preset-card-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  margin-block-end: 0.45rem;
}

.preset-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--g1-gold);
}

.preset-card h3 {
  font-size: 1.05rem;
  margin: 0;
}

.preset-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
}

.preset-voices-badge {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
}

.preset-grp-list {
  display: inline-flex;
  gap: 0.28rem;
}

.grp-mini-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.24rem;
  padding: 0.1rem 0.38rem;
  border-radius: 0.3rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--grp-col, var(--border-subtle));
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-primary);
}

.grp-dot {
  inline-size: 0.42rem;
  block-size: 0.42rem;
  border-radius: 999px;
  background: var(--grp-col);
}

.preset-card-desc {
  margin: 0;
  font-size: 0.89rem;
  color: var(--text-secondary);
}

.preset-card-footer .btn {
  inline-size: 100%;
}

/* ---- External MIDI & Studio Setup ---- */

.midi-cards-grid {
  display: grid;
  gap: 1rem;
  margin-block-end: 1.5rem;
}

@media (min-width: 54rem) {
  .midi-cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.midi-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.3rem;
}

.midi-info-card h3 {
  font-size: 1.08rem;
}

.midi-info-card p {
  margin: 0;
  font-size: 0.91rem;
}

.cc-search-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-end: 0.85rem;
}

.cc-search-bar input {
  flex: 1 1 16rem;
}

.cc-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.cc-table {
  inline-size: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.cc-table th,
.cc-table td {
  padding: 0.6rem 0.85rem;
  border-block-end: 1px solid var(--border-subtle);
}

.cc-table th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 600;
}

.cc-sec-tag {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 0.3rem;
  background: rgba(56, 216, 248, 0.10);
  color: var(--g3-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* ---- Modal <dialog> (Modern Web Guidance compliant) ---- */

dialog.modal-dialog {
  max-inline-size: min(40rem, calc(100% - 2rem));
  inline-size: 100%;
  padding: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.75);
}

dialog.modal-dialog:modal {
  overscroll-behavior: contain;
}

dialog.modal-dialog::backdrop {
  background: rgba(5, 8, 14, 0.76);
  backdrop-filter: blur(4px);
  overflow: hidden;
  overscroll-behavior: contain;
}

dialog.modal-dialog[open] {
  display: grid;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.4rem;
  border-block-end: 1px solid var(--border-subtle);
}

.modal-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.modal-body {
  padding: 1.25rem 1.4rem 1.5rem;
  max-block-size: 75vh;
  overflow-y: auto;
}

.shortcut-dl {
  display: grid;
  grid-template-columns: minmax(9.5rem, auto) 1fr;
  gap: 0.65rem 1.1rem;
  margin: 0;
  font-size: 0.9rem;
}

.shortcut-dl dt {
  color: var(--text-primary);
  font-weight: 600;
}

.shortcut-dl dd {
  margin: 0;
  color: var(--text-secondary);
}

/* ---- Footer ---- */

.site-footer {
  padding-block: 2.5rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Forced Colors / High Contrast Accessibility */
@media (forced-colors: active) {
  .emu-shell,
  .steps-card,
  .flasher-card,
  .stage-card,
  .preset-card,
  .explorer-detail,
  .midi-info-card,
  .btn {
    border: 1px solid ButtonText;
  }
}