/* Guitar Lick Lab Tools — shared 2026 interface refresh
   Presentation-only overrides. Existing page logic and component structure remain intact. */

:root {
  --bg: #f4f7fa;
  --bg-deep: #e9eef3;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #edf2f7;
  --border: #dce4ec;
  --border-light: #c6d1dc;
  --text: #17232e;
  --text-dim: #506171;
  --text-faint: #71808e;
  --accent: #ec551f;
  --accent-bright: #ff6f32;
  --accent-deep: #bf3b12;
  --accent-soft: rgba(236, 85, 31, 0.10);
  --success: #13815e;
  --error: #c33d49;
  --shadow-deep: 0 24px 64px -38px rgba(31, 50, 67, 0.42);
  --font-sans: 'IBM Plex Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Fraunces', Georgia, serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;
}

html { color-scheme: light; }

body {
  background:
    radial-gradient(circle at 8% -8%, rgba(255, 181, 46, 0.20), transparent 30rem),
    radial-gradient(circle at 95% 12%, rgba(54, 134, 199, 0.10), transparent 27rem),
    linear-gradient(180deg, #fbfcfe 0, var(--bg) 30rem, #eef3f7 100%) !important;
  color: var(--text) !important;
  font-family: var(--font-sans) !important;
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  opacity: 0.09 !important;
  mix-blend-mode: multiply;
}

a { text-underline-offset: 3px; }

::selection { background: rgba(255, 111, 50, 0.24); color: #111b24; }

:focus-visible {
  outline: 3px solid rgba(255, 111, 50, 0.34) !important;
  outline-offset: 3px !important;
}

.container { max-width: 1320px !important; }

/* Navigation */
.topnav {
  position: relative;
  padding: 12px 16px !important;
  margin-bottom: 34px !important;
  border: 1px solid rgba(205, 216, 226, 0.9) !important;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 32px -24px rgba(19, 34, 47, 0.45);
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
}

.brand-link { gap: 11px !important; }

.brand-logo-link {
  display: inline-flex;
  flex: 0 0 auto;
  line-height: 0;
  border-radius: 13px;
}

.brand-tagline:hover {
  color: var(--accent-deep) !important;
  text-decoration: underline;
}

.brand-logo {
  width: 52px !important;
  height: 52px !important;
  object-fit: contain;
  opacity: 1 !important;
  filter: none !important;
}

.brand-title {
  font-family: var(--font-sans) !important;
  font-size: 18px !important;
  font-weight: 750 !important;
  letter-spacing: -0.025em !important;
  color: var(--text) !important;
}

.brand-tagline {
  font-family: var(--font-sans) !important;
  font-size: 11px !important;
  font-weight: 550;
  letter-spacing: 0.06em !important;
  text-transform: none !important;
  color: var(--text-faint) !important;
}

.version-badge {
  font-size: 10px !important;
  color: var(--accent-deep) !important;
  border-color: rgba(236, 85, 31, 0.26) !important;
  background: var(--accent-soft) !important;
}

.nav-right { gap: 4px !important; }

.nav-link {
  font-family: var(--font-sans) !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
  color: var(--text-dim) !important;
  padding: 9px 12px !important;
}

.nav-link:hover,
.nav-link.current {
  color: var(--accent-deep) !important;
  background: var(--accent-soft) !important;
}

.social-link { color: #637382 !important; }
.social-link:hover { color: var(--accent) !important; background: var(--accent-soft) !important; }
.nav-divider { background: var(--border) !important; }

/* Arcade hub: the same light premium palette, shifted cooler with a subtle
   pixel-grid atmosphere so the game menu feels like a distinct destination. */
body.arcade-hub {
  position: relative;
  isolation: isolate;
  background:
    linear-gradient(rgba(47, 117, 171, 0.055) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, rgba(47, 117, 171, 0.055) 1px, transparent 1px) 0 0 / 32px 32px,
    radial-gradient(circle at 9% -6%, rgba(97, 87, 209, 0.20), transparent 31rem),
    radial-gradient(circle at 94% 13%, rgba(255, 171, 42, 0.22), transparent 28rem),
    linear-gradient(180deg, #f9fbff 0, #edf5fb 31rem, #eef2f7 100%) !important;
}

body.arcade-hub::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.34;
  background:
    linear-gradient(90deg,
      transparent 0 8px,
      rgba(242, 88, 35, 0.46) 8px 16px,
      transparent 16px 32px,
      rgba(255, 181, 43, 0.52) 32px 40px,
      transparent 40px 64px) 7vw 8rem / 64px 8px no-repeat,
    linear-gradient(90deg,
      rgba(70, 111, 190, 0.48) 0 8px,
      transparent 8px 24px,
      rgba(100, 85, 208, 0.46) 24px 40px,
      transparent 40px 64px) calc(100% - 6vw) 17rem / 64px 8px no-repeat,
    linear-gradient(90deg,
      transparent 0 16px,
      rgba(255, 181, 43, 0.48) 16px 24px,
      transparent 24px 40px,
      rgba(242, 88, 35, 0.40) 40px 56px,
      transparent 56px 64px) calc(100% - 11vw) calc(100% - 9rem) / 64px 8px no-repeat;
}

body.arcade-hub > * {
  position: relative;
  z-index: 1;
}

.arcade-hub .hero {
  position: relative;
  overflow: hidden;
  padding: 34px 36px 38px !important;
  border: 1px solid rgba(63, 112, 157, 0.18);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.60);
  box-shadow: 0 30px 70px -50px rgba(36, 69, 98, 0.64);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.arcade-hub .hero::after {
  content: '';
  position: absolute;
  top: 28px;
  right: 30px;
  width: 9px;
  height: 9px;
  background: #ffb52b;
  opacity: 0.72;
  box-shadow:
    12px 0 #ffb52b,
    24px 0 #f25823,
    36px 0 #f25823,
    48px 0 #516fc3,
    0 12px #ffb52b,
    24px 12px #f25823,
    48px 12px #516fc3,
    60px 12px #516fc3,
    12px 24px #6a58d0,
    24px 24px #6a58d0,
    36px 24px #516fc3,
    60px 24px #ffb52b;
}

.arcade-hub .game-card {
  border-top: 3px solid color-mix(in srgb, var(--accent) 72%, #ffb52b) !important;
}

@media (max-width: 700px) {
  .arcade-hub .hero { padding: 28px 22px 30px !important; }
  .arcade-hub .hero::after { opacity: 0.34; transform: scale(.78); transform-origin: top right; }
}

/* Type hierarchy */
.hero-eyebrow,
.section-eyebrow,
.spotlight-eyebrow,
.arcade-band-eyebrow,
.mono-label {
  color: var(--accent-deep) !important;
  font-family: var(--font-sans) !important;
  font-size: 12px !important;
  font-weight: 700 !important;
  letter-spacing: 0.12em !important;
}

.hero h1,
.section-title,
.spotlight-title,
.arcade-band-title {
  color: var(--text) !important;
  letter-spacing: -0.04em !important;
}

.hero h1 {
  font-family: var(--font-sans) !important;
  font-weight: 760 !important;
  line-height: 1.02 !important;
}

.hero h1 em,
.section-title em,
.spotlight-title em,
.arcade-band-title em {
  color: var(--accent) !important;
  font-family: var(--font-serif);
  font-weight: 520;
}

.hero p,
.hero-sub,
.section-intro { color: var(--text-dim) !important; font-size: 17px !important; }

.breadcrumb { color: var(--text-faint) !important; font-size: 12px !important; }

/* General surfaces */
.stats-strip,
.tool-card,
.panel,
.belt-widget,
.control-panel,
.results-panel,
.result-card,
.info-card,
.content-card,
.brand-box,
.faq-item,
.related-link,
.game-card,
.diff-btn,
.choice-btn,
.modal {
  background: rgba(255, 255, 255, 0.94) !important;
  border-color: var(--border) !important;
  box-shadow: var(--shadow-deep) !important;
}

.tool-card,
.game-card,
.related-link,
.diff-btn,
.choice-btn {
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, background-color 180ms ease !important;
}

.tool-card:hover,
.game-card.playable:hover,
.related-link:hover,
.diff-btn:hover,
.choice-btn:hover:not(:disabled) {
  transform: translateY(-4px) !important;
  border-color: color-mix(in srgb, var(--accent) 48%, var(--border)) !important;
  box-shadow: 0 24px 55px -34px rgba(27, 48, 66, 0.54) !important;
}

.tool-card h3,
.game-card h3,
.panel h2,
.modal h2,
.brand-box h2,
.faq-question { color: var(--text) !important; }

.tool-card p,
.game-card p,
.panel p,
.modal p,
.brand-box p,
.faq-answer { color: var(--text-dim) !important; font-size: 15px; }

.tool-badge,
.game-card-best,
.game-card-cta,
.tool-cta { color: var(--accent-deep) !important; }

/* Buttons and controls */
.btn,
button,
select,
input,
textarea {
  font-family: var(--font-sans) !important;
}

.btn,
.mode-btn,
.position-btn,
.filter-btn,
.preset-btn,
.tab-btn,
.toggle-btn,
.action-btn,
.string-btn {
  font-size: 14px !important;
  font-weight: 650 !important;
  color: var(--text) !important;
  background: #fff !important;
  border-color: var(--border-light) !important;
  box-shadow: 0 2px 6px rgba(26, 43, 57, 0.06);
}

.btn:hover,
.mode-btn:hover,
.position-btn:hover,
.filter-btn:hover,
.preset-btn:hover,
.tab-btn:hover,
.toggle-btn:hover,
.action-btn:hover,
.string-btn:hover {
  color: var(--accent-deep) !important;
  border-color: rgba(236, 85, 31, 0.42) !important;
}

.btn-primary,
.primary-btn,
.submit-btn,
.mode-btn.active,
.position-btn.active,
.filter-btn.active,
.preset-btn.active,
.tab-btn.active,
.toggle-btn.active,
.action-btn.primary {
  color: #fff !important;
  border-color: transparent !important;
  background: linear-gradient(135deg, #ff7438, #e94415) !important;
  box-shadow: 0 10px 24px -13px rgba(218, 58, 13, 0.72) !important;
}

select,
input[type="text"],
input[type="email"],
input[type="number"],
textarea {
  min-height: 44px;
  color: var(--text) !important;
  background: #fff !important;
  border-color: var(--border-light) !important;
}

input::placeholder,
textarea::placeholder { color: #8795a2 !important; opacity: 1; }

/* Fretboards sit on a focused instrument stage. */
.fretboard-card,
.fretboard-wrap {
  border-radius: 18px !important;
}

.fretboard-card {
  background:
    radial-gradient(circle at 50% 0, rgba(255, 154, 77, 0.08), transparent 32rem),
    linear-gradient(145deg, #182632 0%, #0e1821 100%) !important;
  border: 1px solid #263b4b !important;
  box-shadow: 0 28px 66px -34px rgba(3, 12, 19, 0.84) !important;
}

.fretboard-card .fb-meta-label,
.fretboard-card .fretboard-meta,
.fretboard-card .fretboard-title,
.fretboard-card h2,
.fretboard-card h3 { color: #f6f9fb !important; }

.fretboard-card .fb-meta-value,
.fretboard-card .fretboard-sub,
.fretboard-card p { color: #aebdca !important; }

.fretboard-scroll {
  padding: 10px 4px 12px;
  scrollbar-color: #4c6171 transparent;
}

.fretboard-scroll::-webkit-scrollbar-thumb { background: #4c6171 !important; }

.fretboard-mode-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 0 18px;
  padding: 14px 16px;
  background: linear-gradient(145deg, #1a2b36, #101b23);
  border: 1px solid #334857;
  border-radius: 14px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.fretboard-mode-label {
  flex: 0 0 auto;
  color: #d7a45f;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1.35;
  text-transform: uppercase;
}

.fretboard-mode-controls .toggle-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  flex: 1 1 460px;
  width: auto;
  max-width: 620px;
  margin: 0;
}

.fretboard-mode-controls--triple .toggle-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 800px;
}

.fretboard-mode-controls .toggle-card,
.fretboard-mode-controls .toggle-btn {
  min-height: 48px;
}

.fretboard-collection {
  display: grid;
  gap: 14px;
}

.fretboard-collection > .fretboard-mode-controls {
  margin-bottom: 0;
}

.panel-row--root-only {
  grid-template-columns: minmax(240px, 520px) !important;
}

@media (max-width: 700px) {
  .fretboard-mode-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .fretboard-mode-controls .toggle-row,
  .fretboard-mode-controls--triple .toggle-row {
    grid-template-columns: 1fr;
    flex-basis: auto;
    max-width: none;
    width: 100%;
  }
}

.fretboard-wrap svg,
.fretboard-svg {
  filter: drop-shadow(0 16px 18px rgba(0, 0, 0, 0.24));
}

/* Shared SVG finish for the main learning tools. The script adds the wood,
   binding and lighting layers; these rules refine class-based renderers such
   as World Music Scales while leaving all note coordinates untouched. */
.fretboard-svg.premium-fretboard {
  overflow: visible;
}

.premium-fretboard .fb-fret {
  stroke: url(#pfFret) !important;
  stroke-width: 3px !important;
}

.premium-fretboard .fb-nut {
  stroke: url(#pfNut) !important;
  stroke-width: 7px !important;
}

.premium-fretboard .fb-marker {
  fill: url(#pfInlay) !important;
  stroke: rgba(248, 252, 255, 0.48);
  stroke-width: 0.8px;
}

.premium-fretboard .fb-string {
  stroke: #f2e3c7 !important;
  stroke-width: 1.15px !important;
  filter: drop-shadow(0 1px 0 rgba(0, 0, 0, 0.62));
}

.premium-fretboard .fb-string[data-premium-string="2"] { stroke: #ead2a5 !important; stroke-width: 1.45px !important; }
.premium-fretboard .fb-string[data-premium-string="3"] { stroke: #dfbf85 !important; stroke-width: 1.8px !important; }
.premium-fretboard .fb-string[data-premium-string="4"] { stroke: #d5ac68 !important; stroke-width: 2.15px !important; }
.premium-fretboard .fb-string[data-premium-string="5"] { stroke: #ca9952 !important; stroke-width: 2.55px !important; }

.premium-fretboard .fb-fret-label {
  fill: #d49b55 !important;
  font-size: 10px !important;
  font-weight: 700;
}

.premium-fretboard .fb-string-label {
  fill: #f2f6f9 !important;
  font-family: var(--font-sans) !important;
  font-size: 11px !important;
  font-weight: 750 !important;
}

.premium-fretboard .fb-note-circle {
  stroke: rgba(248, 251, 253, 0.96) !important;
  stroke-width: 1.3px !important;
  opacity: 0.98 !important;
}

.premium-fretboard .fb-note-path .fb-note-circle {
  stroke: var(--accent-bright) !important;
  stroke-width: 2.2px !important;
}

.premium-fretboard .fb-note.active .fb-note-circle {
  filter: drop-shadow(0 0 6px var(--accent-bright)) drop-shadow(0 0 12px rgba(240, 192, 104, 0.62)) !important;
}

.premium-string-badge {
  filter: drop-shadow(0 2px 2px rgba(0, 0, 0, 0.38));
}

/* Arcade */
.belt-mini,
.belt-bar-track { background: var(--surface-3) !important; border-color: var(--border) !important; }
.belt-name,
.diff-btn-name,
.results-score,
.results h2 { color: var(--text) !important; }
.belt-xp-line,
.diff-rules,
.diff-btn-meta,
.diff-btn-best,
.results-sub,
.results-avgtime,
.review-q,
.review-a { color: var(--text-dim) !important; }

.diff-preview,
.question-area .fretboard-wrap,
.review-visual .fretboard-wrap {
  background: linear-gradient(145deg, #172631, #0c151d);
  border: 1px solid #263b4b;
  border-radius: 18px !important;
  padding: 12px;
  box-shadow: 0 24px 48px -34px rgba(1, 8, 13, 0.9);
}

.timer-track { background: #dce5ec !important; }
.review-entry { border-color: var(--border) !important; }
.review-item.expandable:hover { background: var(--surface-2) !important; }

.modal-backdrop { background: rgba(9, 18, 26, 0.72) !important; backdrop-filter: blur(5px); }
.modal textarea { background: #f7f9fb !important; }

/* Footer and supporting content */
.footer { border-color: var(--border) !important; color: var(--text-faint) !important; }
.brand-box-logo { filter: none !important; background: #17232e; border-radius: 16px; padding: 8px; }
.faq-item { box-shadow: none !important; }
.faq-question:hover { color: var(--accent-deep) !important; }

@media (max-width: 760px) {
  body { padding: 10px 10px 42px !important; font-size: 16px; }
  .topnav { border-radius: 14px; padding: 10px 11px !important; gap: 10px !important; }
  .brand-logo { width: 46px !important; height: 46px !important; }
  .brand-title { font-size: 16px !important; }
  .hero { padding-left: 4px !important; padding-right: 4px !important; }
  .hero p, .hero-sub, .section-intro { font-size: 16px !important; }
  .tool-card, .game-card { padding: 22px !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}