/* style.css — Rubato Metronome design system */

@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@700,500,400&f[]=satoshi@400,500,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Type scale */
  --text-xs: clamp(0.72rem, 0.69rem + 0.16vw, 0.8rem);
  --text-sm: clamp(0.82rem, 0.78rem + 0.2vw, 0.9rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.2vw, 1rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.35rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2.1rem);
  --text-2xl: clamp(2rem, 1.6rem + 2vw, 3.2rem);

  --text-mono-sm: clamp(0.78rem, 0.75rem + 0.15vw, 0.86rem);
  --text-mono-md: clamp(1rem, 0.92rem + 0.35vw, 1.2rem);
  --text-mono-lg: clamp(1.6rem, 1.3rem + 1.4vw, 2.6rem);
  --text-mono-xl: clamp(2.6rem, 2rem + 3vw, 4.4rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Satoshi', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Surfaces — graphite / instrument black, warm-neutral undertone */
  --color-bg: #0c0d0f;
  --color-surface: #14161a;
  --color-surface-2: #191c21;
  --color-surface-offset: #1d2026;
  --color-surface-raised: #232630;
  --color-divider: #262932;
  --color-border: #2f333d;
  --color-border-strong: #3d4250;

  /* Text */
  --color-text: #eceef1;
  --color-text-muted: #9296a3;
  --color-text-faint: #5c6070;
  --color-text-inverse: #0c0d0f;

  /* Primary accent — warm amber tempo-light */
  --color-primary: #ff9f45;
  --color-primary-hover: #ffb268;
  --color-primary-active: #e8892f;
  --color-primary-dim: #7a5330;
  --color-primary-highlight: #2c2418;

  /* Secondary accent — cool cyan for curve B / accents */
  --color-accent-2: #52c7d1;
  --color-accent-2-dim: #2a4448;

  /* Curve-type colors (data viz — distinguishable, muted) */
  --color-curve-a: #ff9f45;
  --color-curve-b: #52c7d1;
  --color-curve-c: #b285e0;
  --color-curve-l: #8ea6ff;

  /* Semantic */
  --color-success: #6bbf7a;
  --color-error: #e5697a;
  --color-error-highlight: #3a2429;
  --color-warning: #e0b64f;

  /* Radius */
  --radius-sm: 0.3rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.85rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 140ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-snap: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 0 1px rgba(255, 159, 69, 0.15), 0 0 24px rgba(255, 159, 69, 0.12);
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 15% 0%, color-mix(in oklab, var(--color-primary) 4%, transparent), transparent 45%),
    radial-gradient(circle at 100% 100%, color-mix(in oklab, var(--color-accent-2) 3%, transparent), transparent 50%);
  color: var(--color-text);
  min-height: 100dvh;
}

.tabular {
  font-variant-numeric: tabular-nums;
}

/* ============ Layout Shell ============ */

.app-shell {
  max-width: 1360px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-6) var(--space-20);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-2);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-mark {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.logo-weight {
  animation: pendulum-glow 2.4s ease-in-out infinite;
}
@keyframes pendulum-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

.brand-text h1 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-text p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.header-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.03em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--color-text-faint);
  transition: background var(--transition-interactive), box-shadow var(--transition-interactive);
}
.status-dot.live {
  background: var(--color-success);
  box-shadow: 0 0 8px color-mix(in oklab, var(--color-success) 70%, transparent);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.account-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.save-indicator {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: transparent;
  transition: background 0.2s ease;
}
.save-indicator.saving {
  background: var(--color-primary);
  animation: pendulum-glow 0.8s ease-in-out infinite;
}
.save-indicator.saved {
  background: var(--color-success);
}

.account-email {
  color: var(--color-text-muted);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-signout {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 3px 10px;
  cursor: pointer;
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.account-signout:hover {
  color: var(--color-text);
  border-color: var(--color-text-faint);
}

/* ============ Auth Overlay ============ */

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: var(--space-6);
}

.auth-card {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
  background: linear-gradient(180deg, var(--color-surface), var(--color-surface-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  box-shadow: var(--shadow-md);
}

.auth-mark {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
}

.auth-card h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
}

.auth-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
}

.auth-form input[type="email"] {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-align: center;
}
.auth-form input[type="email"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.auth-submit {
  background: var(--color-primary);
  color: var(--color-bg);
  border: none;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-interactive);
}
.auth-submit:hover {
  opacity: 0.9;
}
.auth-submit:disabled {
  opacity: 0.5;
  cursor: default;
}

.auth-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  min-height: 1em;
}
.auth-note.error {
  color: var(--color-danger, #e0645a);
}
.auth-note.success {
  color: var(--color-success);
}

.auth-skip {
  background: transparent;
  border: none;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}
.auth-skip:hover {
  color: var(--color-text-muted);
}

.auth-google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  background: #ffffff;
  color: #1f1f1f;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition-interactive);
}
.auth-google-btn:hover {
  opacity: 0.9;
}
.auth-google-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.auth-divider {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.auth-tabs {
  width: 100%;
  display: flex;
  gap: var(--space-2);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 3px;
}
.auth-tab {
  flex: 1;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  cursor: pointer;
  transition: background var(--transition-interactive), color var(--transition-interactive);
}
.auth-tab.active {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.auth-form input[type="password"] {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  text-align: center;
}
.auth-form input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
}

.auth-link-btn {
  background: transparent;
  border: none;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}
.auth-link-btn:hover {
  color: var(--color-text-muted);
}

/* ============ Transport ============ */

.transport {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-8);
  background: linear-gradient(180deg, var(--color-surface), var(--color-surface-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  box-shadow: var(--shadow-md);
}

@media (max-width: 860px) {
  .transport {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

.transport-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.play-btn {
  width: 68px;
  height: 68px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: grid;
  place-items: center;
  box-shadow: 0 4px 18px color-mix(in oklab, var(--color-primary) 45%, transparent);
  flex-shrink: 0;
}
.play-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}
.play-btn:active {
  transform: translateY(0);
  background: var(--color-primary-active);
}
.play-btn svg {
  width: 26px;
  height: 26px;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: grid;
  place-items: center;
}
.icon-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
  background: var(--color-surface-raised);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
}
.icon-btn.active {
  color: var(--color-primary);
  border-color: color-mix(in oklab, var(--color-primary) 50%, var(--color-border));
}

.transport-readout {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-width: 0;
}

.readout-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.readout-bpm {
  font-family: var(--font-mono);
  font-size: var(--text-mono-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}
.readout-bpm span {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-weight: 400;
  margin-left: var(--space-2);
}

.readout-beat {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}
.readout-beat strong {
  color: var(--color-text);
}

.progress-track {
  position: relative;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.progress-fill {
  position: absolute;
  inset: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary-dim), var(--color-primary));
  border-radius: var(--radius-full);
  transition: none;
}
.progress-beat-ticks {
  position: absolute;
  inset: 0;
  display: flex;
}
.progress-beat-ticks .tick {
  flex: 1;
  border-right: 1px solid color-mix(in oklab, var(--color-bg) 60%, transparent);
}
.progress-beat-ticks .tick:last-child {
  border-right: none;
}

.transport-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: right;
}
.transport-meta strong {
  color: var(--color-text-muted);
}

@media (max-width: 860px) {
  .transport-meta {
    align-items: flex-start;
    text-align: left;
  }
}

/* ============ Section Shells ============ */

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.panel-title-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.panel-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.panel-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1px var(--space-2);
}

.panel-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 60ch;
}

.panel-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ============ Buttons ============ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-offset);
  color: var(--color-text);
  white-space: nowrap;
}
.btn svg {
  width: 15px;
  height: 15px;
}
.btn:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  font-weight: 600;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-muted);
}
.btn-ghost:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}
.btn-danger {
  color: var(--color-error);
}
.btn-danger:hover {
  background: var(--color-error-highlight);
  border-color: color-mix(in oklab, var(--color-error) 50%, var(--color-border));
}
.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ============ Beat Timeline ============ */

.beat-timeline-scroll {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  padding-bottom: var(--space-3);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.beat-timeline-scroll::-webkit-scrollbar {
  height: 8px;
}
.beat-timeline-scroll::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
}

.beat-card {
  flex-shrink: 0;
  width: 188px;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  position: relative;
  transition: border-color var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.beat-card.playing {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}
.beat-card.from-interval {
  border-left: 2px solid var(--color-curve-a);
}

.beat-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.beat-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.03em;
}
.beat-remove {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  color: var(--color-text-faint);
  display: grid;
  place-items: center;
}
.beat-remove:hover {
  color: var(--color-error);
  background: var(--color-error-highlight);
}
.beat-remove svg {
  width: 12px;
  height: 12px;
}

.beat-bpm-input {
  font-family: var(--font-mono);
  font-size: var(--text-mono-md);
  font-weight: 600;
  background: transparent;
  border: none;
  color: var(--color-text);
  width: 100%;
  padding: 0;
}
.beat-bpm-input:focus-visible {
  outline: none;
  color: var(--color-primary);
}

.beat-bpm-unit {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.beat-slider {
  width: 100%;
}

.beat-ms {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.beat-subdiv-tag {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-accent-2);
  background: var(--color-accent-2-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  width: 100%;
}
.beat-subdiv-tag svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}
.beat-subdiv-tag span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.beat-add-card {
  flex-shrink: 0;
  width: 64px;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  color: var(--color-text-faint);
}
.beat-add-card:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.beat-add-card svg {
  width: 20px;
  height: 20px;
}

/* ============ Range slider base ============ */

input[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--color-border-strong);
  outline: none;
}
input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-surface);
  box-shadow: 0 0 0 1px var(--color-primary);
}
input[type='range']::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
  border: 2px solid var(--color-surface);
}

/* ============ Form fields ============ */

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.field label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.field input[type='number'],
.field input[type='text'],
.field select {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
}
.field input:focus-visible,
.field select:focus-visible {
  border-color: var(--color-primary);
}
.field-disabled {
  opacity: 0.4;
}
.field-disabled input {
  cursor: not-allowed;
}
.field-hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%239296a3' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: var(--space-8) !important;
}

/* ============ Interval builder ============ */

.interval-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr) auto;
  gap: var(--space-4);
  align-items: end;
}
@media (max-width: 900px) {
  .interval-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.curve-picker {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}
@media (max-width: 1100px) {
  .curve-picker {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 700px) {
  .curve-picker {
    grid-template-columns: 1fr;
  }
}

.curve-option {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--color-surface-offset);
  text-align: left;
}
.curve-option:hover {
  border-color: var(--color-border-strong);
}
.curve-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.curve-option-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.curve-option-name {
  font-size: var(--text-sm);
  font-weight: 600;
}
.curve-option-desc {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.4;
}
.curve-mini {
  width: 100%;
  height: 36px;
}

.interval-saved-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-5);
}
.interval-saved-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.interval-saved-item .swatch {
  width: 8px;
  height: 34px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}
.interval-saved-info {
  flex: 1;
  min-width: 0;
}
.interval-saved-name {
  font-size: var(--text-sm);
  font-weight: 600;
}
.interval-saved-meta {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}
.interval-saved-actions {
  display: flex;
  gap: var(--space-2);
}

/* ============ Chain rail (tempo map) ============ */

.chain-rail {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  padding: var(--space-2) 0 var(--space-3);
}
.chain-block {
  flex-shrink: 0;
  min-width: 160px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  background: var(--color-surface-offset);
  position: relative;
}
.chain-block .swatch-top {
  height: 4px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-2);
}
.chain-block-name {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: 2px;
}
.chain-block-meta {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}
.chain-remove {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--color-text-faint);
  display: grid;
  place-items: center;
}
.chain-remove:hover {
  color: var(--color-error);
}
.chain-remove svg {
  width: 10px;
  height: 10px;
}
/* ============ Beat selection mode (for patterns) ============ */

.select-mode-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  background: var(--color-accent-2-dim);
  border: 1px solid var(--color-accent-2);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-4);
}
.select-mode-hint {
  font-size: var(--text-sm);
  color: var(--color-accent-2);
  font-weight: 500;
}
.select-mode-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.select-mode-actions input[type='text'] {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.beat-card.select-armed {
  cursor: pointer;
}
.beat-card.select-armed:hover {
  border-color: var(--color-accent-2);
}
.beat-card.select-armed .beat-bpm-input,
.beat-card.select-armed .beat-slider,
.beat-card.select-armed .beat-subdiv-tag,
.beat-card.select-armed .beat-remove {
  pointer-events: none;
  opacity: 0.55;
}
.beat-card.selected-for-pattern {
  border-color: var(--color-accent-2);
  background: var(--color-accent-2-dim);
  box-shadow: 0 0 0 1px var(--color-accent-2);
}
.beat-select-badge {
  position: absolute;
  top: -8px;
  left: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent-2);
  color: var(--color-surface);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-sm);
}

/* ============ Repeating patterns ============ */

.pattern-saved-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.pattern-saved-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.pattern-saved-item .swatch {
  width: 8px;
  height: 34px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  background: var(--color-accent-2);
}
.pattern-saved-info {
  flex: 1;
  min-width: 0;
}
.pattern-saved-name {
  font-size: var(--text-sm);
  font-weight: 600;
}
.pattern-saved-meta {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-text-faint);
}
.pattern-saved-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.repeat-stepper {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2px;
}
.repeat-stepper button {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  color: var(--color-text-faint);
  display: grid;
  place-items: center;
  font-size: var(--text-sm);
  line-height: 1;
}
.repeat-stepper button:hover {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}
.repeat-stepper input {
  width: 34px;
  text-align: center;
  background: transparent;
  border: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text);
}
.chain-block.pattern-block .swatch-top {
  background: var(--color-accent-2);
}
.chain-block-repeat-stepper {
  margin-top: var(--space-2);
}

.chain-empty {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  padding: var(--space-6);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  width: 100%;
}

.tempo-map-wrap {
  margin-top: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-offset);
  padding: var(--space-4);
}
.tempo-map-wrap canvas {
  width: 100%;
  height: 180px;
  display: block;
}
.tempo-map-legend {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}
.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}
.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

/* ============ Subdivision Drawer (overlay) ============ */

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in oklab, black 65%, transparent);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease-snap);
}
.drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.drawer-panel {
  width: 100%;
  max-width: 760px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: var(--space-6);
  transform: translateY(24px);
  transition: transform 240ms var(--ease-snap);
  box-shadow: var(--shadow-lg);
}
.drawer-overlay.open .drawer-panel {
  transform: translateY(0);
}

@media (min-width: 720px) {
  .drawer-overlay {
    align-items: center;
  }
  .drawer-panel {
    border-radius: var(--radius-xl);
    max-height: 82vh;
  }
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}
.drawer-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
}
.drawer-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  display: grid;
  place-items: center;
}
.drawer-close:hover {
  color: var(--color-text);
  background: var(--color-surface-raised);
}
.drawer-close svg {
  width: 16px;
  height: 16px;
}

.unit-canvas-wrap {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-offset);
  padding: var(--space-4);
  margin-bottom: var(--space-5);
}

.unit-bar {
  display: flex;
  width: 100%;
  height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.unit-bar-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-inverse);
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: flex-basis 120ms var(--ease-snap);
}

.unit-sum-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}
.unit-sum-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.unit-sum-status.valid { color: var(--color-success); }
.unit-sum-status.invalid { color: var(--color-error); }
.unit-sum-status svg {
  width: 14px;
  height: 14px;
}

.subdiv-row-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.subdiv-row {
  display: grid;
  grid-template-columns: 24px 1fr 90px 32px;
  align-items: center;
  gap: var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.subdiv-row-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.subdiv-row-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-align: right;
}
.subdiv-row-remove {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  color: var(--color-text-faint);
  display: grid;
  place-items: center;
}
.subdiv-row-remove:hover {
  color: var(--color-error);
  background: var(--color-error-highlight);
}
.subdiv-row-remove svg {
  width: 12px;
  height: 12px;
}

.drawer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-divider);
  flex-wrap: wrap;
}

.saved-profile-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.saved-profile-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
}
.saved-profile-chip:hover {
  border-color: var(--color-accent-2);
  color: var(--color-accent-2);
}
.saved-profile-chip.active {
  border-color: var(--color-accent-2);
  background: var(--color-accent-2-dim);
  color: var(--color-accent-2);
}

/* ============ Toast ============ */

.toast {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms var(--ease-snap), transform 200ms var(--ease-snap);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.error {
  border-color: color-mix(in oklab, var(--color-error) 50%, var(--color-border));
  color: var(--color-error);
}
.toast svg {
  width: 15px;
  height: 15px;
}

/* ============ Footer ============ */

.app-footer {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ============ Utility ============ */

.mono { font-family: var(--font-mono); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.hidden { display: none !important; }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}