/* ============================================================
   Base: Variables, reset, buttons, modals, utilities
   ============================================================ */

:root {
  --color-bg: #0a0a0f;
  --color-surface: #141419;
  --color-surface-hover: #1e1e25;
  --color-surface-2: #252530;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  --color-text: #e4e4e7;
  --color-text-dim: #a1a1a6;
  --color-text-tertiary: #63636a;
  --color-accent: #8b7cf6;
  --color-accent-dim: rgba(139, 124, 246, 0.15);
  --color-accent-hover: rgba(139, 124, 246, 0.10);
  --color-record: #ef4444;
  --color-record-glow: rgba(239, 68, 68, 0.25);
  --color-play: #22c55e;
  --color-stop: #f97316;
  --color-mute: #71717a;
  --color-solo: #eab308;
  --color-clear: #71717a;
  --color-delete: #ef4444;
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  overscroll-behavior: none;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
  overscroll-behavior: none;
  touch-action: manipulation;
  -webkit-touch-callout: none;
}

#app {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px;
}

/* Buttons — ghost by default */
.btn {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-text-dim);
  cursor: pointer;
  padding: 8px 14px;
  min-height: 44px;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
  user-select: none;
}

@media (hover: hover) {
  .btn:hover {
    color: var(--color-text);
    border-color: var(--color-border-hover);
    background: var(--color-surface-hover);
  }
}

.btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* Auth UI */
.auth-ui {
  display: flex;
  align-items: center;
}

.btn-auth-signin {
  color: var(--color-text-dim);
  border-color: var(--color-border);
  font-size: 12px;
  padding: 6px 12px;
  white-space: nowrap;
}

@media (hover: hover) {
  .btn-auth-signin:hover {
    color: var(--color-text);
    border-color: var(--color-border-hover);
    background: var(--color-accent-hover);
  }
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 8px;
}

.auth-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

.auth-name {
  font-size: 12px;
  color: var(--color-text-dim);
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: none;
}

.btn-auth-signout {
  font-size: 11px;
  padding: 4px 8px;
  color: var(--color-text-dim);
  border-color: var(--color-border);
}

@media (hover: hover) {
  .btn-auth-signout:hover {
    color: var(--color-record);
    border-color: var(--color-record);
  }
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06), 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
}

.btn-modal-close {
  font-size: 18px;
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  padding: 4px 8px;
}

@media (hover: hover) {
  .btn-modal-close:hover {
    color: var(--color-text);
  }
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
}

/* Save indicator */
.save-indicator {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
}

.save-saving { color: var(--color-accent); }
.save-saved { color: var(--color-play); }
.save-error { color: var(--color-record); }
.save-unsaved { color: var(--color-solo); }

/* Offline indicator */
body.offline::after {
  content: 'Offline';
  position: fixed;
  bottom: 12px;
  right: 12px;
  background: var(--color-record);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  z-index: 2000;
  pointer-events: none;
}

/* Footer */
.app-footer {
  margin-top: 24px;
  padding: 12px 0;
  border-top: 1px solid var(--color-border);
}

.hint {
  font-size: 12px;
  color: var(--color-text-dim);
}

/* Spinner */
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Desktop base */
@media (min-width: 640px) {
  #app {
    padding: 20px;
  }

  .auth-name {
    display: block;
  }

  .btn {
    min-height: unset;
    padding: 8px 14px;
  }
}