/**
 * Main CSS for Guitar Chord Visualizer
 * Dark urban-jazz interface with responsive, accessible controls.
 */

:root {
  --primary-color: #d6a74f;
  --primary-color-rgb: 214, 167, 79;
  --secondary-color: #8c96a5;
  --success-color: #41c48d;
  --info-color: #62c6d8;
  --warning-color: #e7b85d;
  --danger-color: #ef6b73;
  --dark-color: #0b111b;
  --light-color: #f3ead8;
  --app-bg: #070b12;
  --app-bg-soft: #101826;
  --surface-color: #121b2a;
  --surface-color-raised: #172234;
  --surface-color-muted: #0f1724;
  --border-color: rgba(214, 167, 79, 0.18);
  --border-color-strong: rgba(214, 167, 79, 0.42);
  --text-color: #f7efe0;
  --text-muted: #9ca8b8;
  --text-subtle: #6f7c8f;
  --blue-accent: #1f5f85;
  --brass-color: #d6a74f;
  --brass-deep: #9b6b22;
  --green-glow: #41c48d;
  --border-radius: 8px;
  --box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
  --box-shadow-lg: 0 28px 70px rgba(0, 0, 0, 0.42);
  --inner-glow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --transition: all 0.22s ease;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--app-bg);
}

body {
  font-family:
    Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  color: var(--text-color);
  background:
    radial-gradient(
      circle at 18% -8%,
      rgba(31, 95, 133, 0.38),
      transparent 34rem
    ),
    radial-gradient(
      circle at 88% 4%,
      rgba(214, 167, 79, 0.12),
      transparent 28rem
    ),
    linear-gradient(145deg, #05070c 0%, #09111d 44%, #0b1625 100%);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.72), transparent 86%);
}

.app-main {
  max-width: 1440px;
}

.app-navbar {
  background: rgba(5, 8, 13, 0.9) !important;
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.34);
  padding: 0.95rem 0;
  backdrop-filter: blur(16px);
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  color: var(--text-color) !important;
  font-size: 1.35rem;
  font-weight: 750;
  letter-spacing: 0;
  transition: var(--transition);
}

.navbar-brand:hover,
.navbar-brand:focus {
  color: var(--primary-color) !important;
}

.navbar-brand i {
  margin-right: 0.75rem;
  color: var(--primary-color);
  font-size: 1.3rem;
}

.app-footer {
  color: var(--text-muted);
  background: rgba(5, 8, 13, 0.88) !important;
  border-top: 1px solid var(--border-color);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1.5rem;
  padding: 0;
  margin: 0.5rem 0 0;
  list-style: none;
  font-size: 0.875rem;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-muted);
  text-decoration: none;
  text-underline-offset: 4px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--primary-color);
  text-decoration: underline;
}

.footer-links a:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.card {
  color: var(--text-color);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 34%),
    var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(214, 167, 79, 0.3);
  box-shadow: var(--box-shadow-lg);
}

.app-card-feature {
  background:
    radial-gradient(
      circle at 12% 0%,
      rgba(31, 95, 133, 0.28),
      transparent 28rem
    ),
    linear-gradient(180deg, rgba(214, 167, 79, 0.055), transparent 36%),
    var(--surface-color);
}

.card-header,
.app-card-header {
  color: var(--text-color);
  background:
    linear-gradient(90deg, rgba(214, 167, 79, 0.16), rgba(31, 95, 133, 0.12)),
    rgba(255, 255, 255, 0.025);
  border: 0;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0 !important;
  padding: 1rem 1.25rem;
  font-weight: 650;
}

.card-header i {
  margin-right: 0.65rem;
  color: var(--primary-color);
  font-size: 1.05rem;
}

.card-body {
  padding: 1.25rem;
}

.card-title,
h4,
h5,
h6 {
  color: var(--text-color);
  letter-spacing: 0;
}

.text-muted {
  color: var(--text-muted) !important;
}

.text-info {
  color: var(--info-color) !important;
}

.text-secondary {
  color: var(--text-muted) !important;
}

.text-success {
  color: var(--success-color) !important;
}

.text-primary {
  color: var(--primary-color) !important;
}

.form-label {
  color: var(--text-color);
  font-weight: 650;
  margin-bottom: 0.45rem;
}

.tuning-label {
  color: var(--text-color);
}

.form-control,
.form-select {
  color: var(--text-color);
  background-color: rgba(5, 9, 16, 0.82);
  border: 1px solid rgba(156, 168, 184, 0.26);
  border-radius: 7px;
  padding: 0.72rem 0.9rem;
  transition: var(--transition);
}

.form-control::placeholder {
  color: var(--text-subtle);
}

.form-control:focus,
.form-select:focus {
  color: var(--text-color);
  background-color: #0b1320;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.22rem rgba(var(--primary-color-rgb), 0.18);
}

.form-select {
  color-scheme: dark;
}

.form-text {
  color: var(--text-muted);
  font-size: 0.84rem;
}

.form-control.is-valid {
  color: var(--text-color);
  background-color: rgba(5, 9, 16, 0.82);
  border-color: var(--success-color);
  box-shadow: 0 0 0 0.16rem rgba(65, 196, 141, 0.16);
}

.form-control.is-invalid {
  color: var(--text-color);
  background-color: rgba(5, 9, 16, 0.82);
  border-color: var(--danger-color);
  box-shadow: 0 0 0 0.16rem rgba(239, 107, 115, 0.15);
}

.valid-feedback,
.invalid-feedback {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  font-size: 0.875em;
  font-weight: 600;
}

.valid-feedback {
  color: var(--success-color);
}

.invalid-feedback {
  color: var(--danger-color);
}

.btn {
  border-radius: 7px;
  border: 1px solid transparent;
  font-weight: 650;
  padding: 0.72rem 1.2rem;
  transition: var(--transition);
}

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

.btn:active {
  transform: translateY(1px) !important;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.48;
  transform: none !important;
}

.btn-success,
.btn-primary {
  color: #0b111b;
  background: linear-gradient(
    135deg,
    #f0cb78 0%,
    var(--primary-color) 48%,
    #a97423 100%
  );
  border-color: rgba(255, 231, 179, 0.42);
  box-shadow: 0 10px 22px rgba(214, 167, 79, 0.18);
}

.btn-success:hover,
.btn-primary:hover,
.btn-success:focus,
.btn-primary:focus {
  color: #06090f;
  background: linear-gradient(135deg, #f6d88f 0%, #e1b866 50%, #b9802d 100%);
  border-color: rgba(255, 231, 179, 0.58);
  box-shadow: 0 14px 30px rgba(214, 167, 79, 0.25);
}

.btn-outline-secondary,
.btn-outline-primary,
.btn-outline-danger {
  color: var(--text-color);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(156, 168, 184, 0.32);
}

.btn-outline-secondary:hover,
.btn-outline-primary:hover,
.btn-outline-danger:hover,
.btn-outline-secondary:focus,
.btn-outline-primary:focus,
.btn-outline-danger:focus {
  color: var(--primary-color);
  background: rgba(214, 167, 79, 0.08);
  border-color: var(--border-color-strong);
}

.btn-outline-danger {
  color: #ffd4d7;
  border-color: rgba(239, 107, 115, 0.42);
}

.btn-outline-danger:hover,
.btn-outline-danger:focus {
  color: #fff0f1;
  background: rgba(239, 107, 115, 0.12);
  border-color: rgba(239, 107, 115, 0.68);
}

.badge {
  border: 1px solid rgba(255, 255, 255, 0.13);
  font-weight: 750;
}

.bg-success {
  color: #07100d !important;
  background-color: var(--success-color) !important;
}

.bg-warning {
  color: #171005 !important;
  background-color: var(--warning-color) !important;
}

.bg-secondary {
  color: var(--text-color) !important;
  background-color: #465365 !important;
}

.bg-primary {
  color: #0b111b !important;
  background-color: var(--primary-color) !important;
}

.alert {
  color: var(--text-color);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--border-radius);
  box-shadow: none;
}

.alert i {
  margin-right: 0.65rem;
}

.alert-success {
  color: #bdf5dc;
  background: rgba(65, 196, 141, 0.1);
  border-color: rgba(65, 196, 141, 0.28);
  border-left-color: var(--success-color);
}

.alert-danger {
  color: #ffd4d7;
  background: rgba(239, 107, 115, 0.1);
  border-color: rgba(239, 107, 115, 0.28);
  border-left-color: var(--danger-color);
}

.alert-info {
  color: #c9f3f9;
  background: rgba(98, 198, 216, 0.1);
  border-color: rgba(98, 198, 216, 0.26);
  border-left-color: var(--info-color);
}

.alert-warning {
  color: #ffe0a3;
  background: rgba(231, 184, 93, 0.1);
  border-color: rgba(231, 184, 93, 0.28);
  border-left-color: var(--warning-color);
}

#loadingIndicator {
  animation: fadeInUp 0.45s ease-out;
}

.spinner-border {
  width: 2.35rem;
  height: 2.35rem;
  color: var(--primary-color);
  border-width: 0.28em;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-slide-up {
  animation: slideInUp 0.35s ease-out;
}

#fretboardContainer,
#resultsContainer {
  border: 1px solid rgba(156, 168, 184, 0.16);
  border-radius: var(--border-radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.026), transparent 44%),
    rgba(7, 12, 20, 0.72);
  box-shadow: var(--inner-glow);
}

#fretboardContainer {
  display: flex;
  min-height: 350px;
  align-items: center;
  justify-content: center;
  margin: 1rem 0;
  padding: 3rem 2rem 2rem;
}

#resultsContainer {
  min-height: 250px;
  padding: 1.15rem;
}

#fretboardContainer > .text-center,
#resultsContainer > .text-center {
  color: var(--text-muted) !important;
}

#fretboardContainer .display-1,
#resultsContainer .display-1 {
  color: rgba(214, 167, 79, 0.42);
}

.empty-state {
  color: var(--text-muted);
  padding: 3rem 2rem;
  text-align: center;
}

.empty-state i {
  margin-bottom: 1.5rem;
  font-size: 4rem;
  opacity: 0.55;
}

.empty-state p {
  margin: 0;
  font-size: 1.05rem;
}

.chord-match {
  cursor: pointer;
  margin-bottom: 0.75rem;
  border-color: rgba(156, 168, 184, 0.16);
}

.chord-match:hover,
.chord-match:focus-within {
  border-color: var(--border-color-strong);
  transform: translateY(-2px);
}

.chord-match.selected {
  background:
    linear-gradient(135deg, rgba(214, 167, 79, 0.12), rgba(65, 196, 141, 0.07)),
    var(--surface-color-raised);
  border-color: var(--primary-color);
}

.chord-match .card-title {
  color: var(--text-color);
  font-weight: 750;
}

.chord-match .card-text {
  color: var(--text-muted);
}

.chord-match .text-info {
  color: var(--primary-color) !important;
}

.chord-result {
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: var(--surface-color-raised);
  border: 1px solid rgba(156, 168, 184, 0.16);
  border-left: 4px solid transparent;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.chord-result:hover {
  border-left-color: var(--primary-color);
  box-shadow: var(--box-shadow-lg);
  transform: translateY(-2px);
}

.chord-result.selected {
  background: rgba(214, 167, 79, 0.1);
  border-left-color: var(--success-color);
}

.chord-name {
  margin-bottom: 0.25rem;
  color: var(--text-color);
  font-size: 1.25rem;
  font-weight: 750;
}

.chord-type {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 550;
}

.similarity-score {
  padding: 0.25rem 0.5rem;
  color: var(--text-color);
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 650;
}

.similarity-high {
  color: #bdf5dc;
  background: rgba(65, 196, 141, 0.16);
}

.similarity-medium {
  color: #ffe0a3;
  background: rgba(231, 184, 93, 0.16);
}

.similarity-low {
  color: #ffd4d7;
  background: rgba(239, 107, 115, 0.14);
}

.list-unstyled li {
  margin-bottom: 0.45rem;
  padding: 0.25rem 0;
  color: var(--text-muted);
  transition: var(--transition);
}

.list-unstyled li:hover {
  color: var(--text-color);
  transform: translateX(4px);
}

.list-unstyled i {
  margin-right: 0.65rem;
  color: var(--success-color) !important;
  font-size: 1rem;
}

.help-card h6 {
  color: var(--primary-color);
  font-weight: 750;
}

.fretboard-container {
  width: 100%;
  padding: 2.25rem 0 1.35rem;
  margin: 1rem 0;
  overflow-x: auto;
  background:
    linear-gradient(180deg, rgba(214, 167, 79, 0.045), transparent 44%), #080f19;
  border: 1px solid rgba(214, 167, 79, 0.14);
  border-radius: var(--border-radius);
  box-shadow: var(--inner-glow);
}

.fretboard-svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  background: #101724;
  border: 1px solid rgba(214, 167, 79, 0.18);
  border-radius: var(--border-radius);
  filter: drop-shadow(0 16px 24px rgba(0, 0, 0, 0.32));
  transition: var(--transition);
}

.fretboard-svg:hover {
  filter: drop-shadow(0 22px 32px rgba(0, 0, 0, 0.4));
}

.fretboard-svg .fret-line {
  stroke: #8b7a5a;
  stroke-width: 2;
  opacity: 0.95;
}

.fretboard-svg .string-line {
  stroke: #d4c7b1;
  stroke-width: 1.5;
  opacity: 0.38;
}

.fretboard-svg .string-narrow {
  stroke: #fff3d5;
  stroke-width: 0.5;
  opacity: 0.78;
}

.fretboard-svg .fret-marker {
  fill: #d6a74f;
  opacity: 0.52;
}

.fretboard-svg .nut {
  stroke: #f3d99b;
  stroke-width: 4;
  fill: #f3d99b;
}

.fretboard-svg .finger-position {
  cursor: pointer;
  filter: drop-shadow(0 3px 7px rgba(0, 0, 0, 0.42));
  transition: var(--transition);
}

.fretboard-svg .finger-position:hover,
.fretboard-svg .finger-position:focus {
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.5));
  transform: scale(1.08);
}

.fretboard-svg .finger-position:active {
  transform: scale(0.96);
}

.fretboard-svg .finger-dot {
  fill: var(--primary-color);
  stroke: #ffe0a3;
  stroke-width: 2;
}

.fretboard-svg .finger-1 {
  fill: #dc686f;
  stroke: #ffd1d5;
}

.fretboard-svg .finger-2 {
  fill: #df9a45;
  stroke: #ffe0a3;
}

.fretboard-svg .finger-3 {
  fill: #d6a74f;
  stroke: #f8df9d;
}

.fretboard-svg .finger-4 {
  fill: #41c48d;
  stroke: #bdf5dc;
}

.fretboard-svg .finger-number {
  fill: #061018;
  font-family: Inter, Arial, sans-serif;
  font-size: 11px;
  font-weight: 800;
  text-anchor: middle;
  dominant-baseline: central;
  text-shadow: none;
}

.fretboard-svg .open-string,
.fretboard-svg .available-open-string {
  fill: none !important;
  stroke: var(--success-color) !important;
  filter: drop-shadow(0 2px 6px rgba(65, 196, 141, 0.35));
}

.fretboard-svg .open-string {
  stroke-width: 4 !important;
}

.fretboard-svg .available-open-string {
  stroke-width: 2 !important;
  opacity: 0.48;
}

.fretboard-svg .muted-string {
  stroke: var(--danger-color);
  stroke-width: 3;
  filter: drop-shadow(0 2px 6px rgba(239, 107, 115, 0.32));
}

.fretboard-svg .available-chord-tone {
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.fretboard-svg .available-chord-tone:hover {
  opacity: 0.82 !important;
}

.fretboard-svg .note-label,
.fretboard-svg .note-label-top {
  fill: #061018 !important;
  font-family: Inter, sans-serif;
  font-weight: 800 !important;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(255, 240, 201, 0.55));
}

.fretboard-svg .note-label {
  font-size: 10px;
}

.fretboard-svg .note-label-top {
  z-index: 9999 !important;
  font-size: 12px;
}

.fretboard-svg .note-labels-layer,
.note-labels-layer .note-label-top {
  position: relative;
  z-index: 10000 !important;
}

.fretboard-tooltip {
  position: absolute;
  z-index: 1000;
  padding: 0.5rem 0.75rem;
  color: var(--text-color);
  pointer-events: none;
  background: #060a11;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: var(--box-shadow);
  opacity: 0;
  font-size: 0.85rem;
  font-weight: 550;
  transition: opacity 0.2s ease;
}

.fretboard-tooltip.show {
  opacity: 1;
}

.chord-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  align-items: center;
  justify-content: center;
  margin: 1.25rem 0;
  padding: 0.95rem;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(156, 168, 184, 0.14);
  border-radius: var(--border-radius);
}

.chord-controls .btn {
  min-width: 120px;
}

.color-legend {
  margin-top: 1rem;
  padding: 1rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(156, 168, 184, 0.14);
  border-radius: var(--border-radius);
}

.legend-title {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
  color: var(--text-color);
}

.legend-title i {
  color: var(--primary-color);
}

.legend-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.86rem;
}

.legend-dot {
  display: inline-block;
  width: 13px;
  height: 13px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.legend-dot.finger-1 {
  background: #dc686f;
}

.legend-dot.finger-2 {
  background: #df9a45;
}

.legend-dot.finger-3 {
  background: #d6a74f;
}

.legend-dot.finger-4 {
  background: #41c48d;
}

.legend-dot.open-string {
  background: transparent;
  border: 2px solid var(--success-color);
}

.legend-dot.muted-string {
  position: relative;
  background: transparent;
  border-color: var(--danger-color);
}

.legend-dot.muted-string::before,
.legend-dot.muted-string::after {
  position: absolute;
  top: 50%;
  left: 1px;
  width: 9px;
  height: 2px;
  content: "";
  background: var(--danger-color);
}

.legend-dot.muted-string::before {
  transform: rotate(45deg);
}

.legend-dot.muted-string::after {
  transform: rotate(-45deg);
}

.position-indicator {
  padding: 0.5rem 0.9rem;
  color: var(--text-color);
  background: rgba(5, 9, 16, 0.82);
  border: 1px solid var(--border-color-strong);
  border-radius: 6px;
  font-weight: 750;
}

.difficulty-indicator {
  display: inline-flex;
  gap: 0.25rem;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 550;
}

.difficulty-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.difficulty-easy .difficulty-dot {
  background: var(--success-color);
}

.difficulty-medium .difficulty-dot {
  background: var(--warning-color);
}

.difficulty-hard .difficulty-dot {
  background: var(--danger-color);
}

.fretboard-loading,
.fretboard-error {
  display: flex;
  min-height: 300px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  border: 1px solid rgba(156, 168, 184, 0.16);
  border-radius: var(--border-radius);
  animation: fadeIn 0.45s ease-out;
}

.fretboard-loading {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.035);
}

.fretboard-loading .spinner-border {
  margin-bottom: 1.25rem;
}

.fretboard-loading p,
.fretboard-error p {
  margin: 0;
  text-align: center;
  font-weight: 550;
}

.fretboard-error {
  color: #ffd4d7;
  background: rgba(239, 107, 115, 0.09);
  border-color: rgba(239, 107, 115, 0.24);
}

.fretboard-error i {
  margin-bottom: 1.25rem;
  font-size: 3.4rem;
  opacity: 0.75;
}

.quick-input-container {
  padding: 1rem;
  margin-top: 1rem;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(156, 168, 184, 0.14);
  border-radius: var(--border-radius);
}

.quick-chord {
  min-height: 36px;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
}

.quick-chord:hover,
.quick-chord:active {
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
  transform: translateY(-1px);
}

.touch-device .form-control {
  min-height: 48px;
  font-size: 16px;
}

.touch-focused {
  border-color: var(--primary-color) !important;
  box-shadow: 0 0 0 0.24rem rgba(var(--primary-color-rgb), 0.18) !important;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.tuning-notification,
.note-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  padding: 0.75rem 1rem;
  color: var(--text-color);
  background: rgba(6, 10, 17, 0.94);
  border: 1px solid var(--border-color-strong);
  border-radius: 8px;
  box-shadow: var(--box-shadow);
  animation: slideInRight 0.3s ease-out;
}

.tuning-notification {
  color: #0b111b;
  background: var(--primary-color);
}

.note-notification {
  padding: 0.75rem;
  font-size: 0.9rem;
}

.btn:focus,
.form-control:focus,
.form-select:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

@media (max-width: 1200px) {
  .container-fluid {
    padding-right: 2rem;
    padding-left: 2rem;
  }

  .fretboard-svg {
    width: 100%;
    max-width: 900px;
  }
}

@media (max-width: 768px) {
  .container-fluid {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .card-body {
    padding: 1.1rem;
  }

  .card-header,
  .app-card-header {
    min-height: 60px;
    padding: 0.95rem 1.05rem;
  }

  .app-card-feature .card-header > .d-flex {
    gap: 0.75rem;
    align-items: flex-start !important;
    flex-direction: column;
  }

  .display-1 {
    font-size: 2.5rem;
  }

  .btn {
    padding: 0.65rem 1.1rem;
    font-size: 0.9rem;
  }

  .navbar-brand {
    min-height: 44px;
    font-size: 1.18rem;
  }

  .row {
    margin-right: -0.5rem;
    margin-left: -0.5rem;
  }

  .col-lg-4,
  .col-lg-8,
  .col-md-6,
  .col-12 {
    padding-right: 0.5rem;
    padding-left: 0.5rem;
  }

  .fretboard-svg {
    width: 100%;
    max-width: 700px;
  }

  .fretboard-container {
    padding: 2rem 0 1rem;
    margin: 0.75rem 0;
  }

  .fretboard-svg .finger-position {
    r: 12;
  }

  .fretboard-svg .note-label {
    font-size: 12px !important;
  }

  .fretboard-svg .note-label-top {
    font-size: 14px !important;
  }

  .chord-controls {
    gap: 0.75rem;
    padding: 0.75rem;
  }

  .chord-controls .btn {
    min-width: 100px;
    min-height: 44px;
    font-size: 0.9rem;
  }

  .position-indicator {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
  }

  .list-unstyled li {
    padding: 0.3rem 0;
    font-size: 0.9rem;
  }

  .list-unstyled i {
    font-size: 0.9rem;
  }

  .btn:focus,
  .form-control:focus,
  .form-select:focus {
    outline: 3px solid var(--primary-color);
  }
}

@media (max-width: 576px) {
  body {
    overflow-x: hidden;
  }

  .container-fluid {
    max-width: 100vw;
    padding-right: 0.75rem;
    padding-left: 0.75rem;
  }

  .row {
    margin-right: -0.25rem;
    margin-left: -0.25rem;
  }

  .col-12,
  .col-md-6,
  .col-lg-4,
  .col-lg-8 {
    padding-right: 0.25rem;
    padding-left: 0.25rem;
  }

  .card-body {
    padding: 1rem;
  }

  .card-header,
  .app-card-header {
    padding: 0.8rem 0.95rem;
    font-size: 0.95rem;
  }

  .btn {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
  }

  .navbar-brand {
    font-size: 1.05rem;
  }

  .display-1 {
    font-size: 2rem;
  }

  .form-control,
  .form-select {
    padding: 0.65rem 0.85rem;
    font-size: 0.9rem;
  }

  #fretboardContainer {
    padding: 2rem 0.5rem 1rem;
  }

  #resultsContainer {
    padding: 0.9rem;
  }

  .fretboard-svg {
    width: 100%;
    max-width: 500px;
  }

  .fretboard-container {
    padding: 1.5rem 0 0.75rem;
    margin: 0.5rem -0.75rem;
    overflow-x: scroll;
    border-radius: 0;
    -webkit-overflow-scrolling: touch;
  }

  .fretboard-svg .finger-position {
    r: 14;
  }

  .fretboard-svg .note-label {
    font-size: 12px !important;
  }

  .fretboard-svg .note-label-top {
    font-size: 16px !important;
  }

  .chord-match {
    margin-bottom: 0.5rem;
  }

  .chord-match .card-body {
    padding: 0.75rem;
  }

  .chord-match .card-title {
    font-size: 1.1rem;
  }

  .chord-match .btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
  }

  .fretboard-loading,
  .fretboard-error {
    padding: 1.5rem 0.75rem;
  }

  .fretboard-loading i,
  .fretboard-error i {
    font-size: 2.5rem;
  }

  .fretboard-loading p,
  .fretboard-error p {
    font-size: 0.9rem;
  }
}

@media print {
  .navbar,
  footer,
  .chord-controls,
  .btn {
    display: none !important;
  }

  .card {
    color: #000 !important;
    background: #fff !important;
    border: 1px solid #ddd !important;
    box-shadow: none !important;
  }

  body {
    color: #000 !important;
    background: #fff !important;
  }
}