/* ============================================================
   FAMILY AUDIO PLAYER — styles.css
   All sizing derived from --base-spacing (vmin).
   Two-layer layout: full-screen bg + aspect-locked canvas.
   Dark / Light themes toggled via body.theme-light class.
   So no matter the screen size the view ratio and all its elements
   maintain consistent proportions, like a painting that can be zoomed in and out of thats always portrait. So on a desktop view it will look like a portrate painting with the blank sides ignored, and on a mobile view it will look like a painting that's been zoomed in and fits the phone screens portrait.
   ============================================================ */

/* ── Reset ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Design Scale Tokens ── */
:root {
  --base-spacing:    2.2vmin;
  --golden-ratio:    1.618;

  --spacing-small:   calc(var(--base-spacing) * 0.618);
  --spacing-medium:  var(--base-spacing);
  --spacing-large:   calc(var(--base-spacing) * var(--golden-ratio));
  --spacing-xlarge:  calc(var(--base-spacing) * var(--golden-ratio) * var(--golden-ratio));

  --font-size-small:  calc(var(--base-spacing) * 0.75);
  --font-size-medium: calc(var(--base-spacing) * 1.0);
  --font-size-large:  calc(var(--base-spacing) * 1.4);
  --font-size-xlarge: calc(var(--base-spacing) * 2.2);

  --border-radius:   calc(var(--base-spacing) * 0.6);
  --tap-target:      calc(var(--base-spacing) * 5);
  --icon-size:       calc(var(--base-spacing) * 3);
}

/* ── Dark Theme (default) ── */
body {
  --bg-outer:        #080808;
  --bg-canvas:       #111111;
  --bg-description:  #181818;
  --bg-button:       #1e1e1e;
  --bg-button-hover: #2c2c2c;
  --bg-button-active:#383838;
  --color-text:      #e6e6e6;
  --color-muted:     #777777;
  --color-accent:    #5aabff;
  --color-border:    #2a2a2a;
  --color-shadow:    rgba(0,0,0,0.7);
}

/* ── Light Theme ── */
body.theme-light {
  --bg-outer:        #e8e8e8;
  --bg-canvas:       #ffffff;
  --bg-description:  #f5f5f5;
  --bg-button:       #ebebeb;
  --bg-button-hover: #dcdcdc;
  --bg-button-active:#cccccc;
  --color-text:      #1a1a1a;
  --color-muted:     #666666;
  --color-accent:    #1a6fc4;
  --color-border:    #cccccc;
  --color-shadow:    rgba(0,0,0,0.15);
}

/* ── Full-screen background wrapper ── */
.app-wrapper {
  position: fixed;
  inset: 0;
  background-color: var(--bg-outer);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.3s ease;
  /* Prevent mobile pull-to-refresh interrupting playback */
  overscroll-behavior: none;
}

/* ── Aspect-locked canvas (the "painting") ── */
/* Portrait: narrower than tall. Width drives scaling. */
.app-canvas {
  position: relative;
  width:      min(94vw, calc(100dvh * 0.56));
  height:     min(94dvh, calc(94vw / 0.56));
  background-color: var(--bg-canvas);
  border-radius: var(--border-radius);
  border: var(--base-spacing) solid transparent;
  border-width: calc(var(--base-spacing) * 0.1);
  border-color: var(--color-border);
  box-shadow: 0 calc(var(--base-spacing) * 0.8) calc(var(--base-spacing) * 3) var(--color-shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* ── Header region ── */
.app-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--spacing-medium) * 0.9) calc(var(--spacing-large) * 0.9);
  border-bottom: calc(var(--base-spacing) * 0.08) solid var(--color-border);
}

.app-title {
  font-size: calc(var(--font-size-large) * 0.75);
  color: var(--color-text);
  font-weight: normal;
  letter-spacing: 0.05em;
}

.recording-counter {
  font-size: calc(var(--font-size-small) * 0.75);
  color: var(--color-muted);
}

/* ── Theme toggle button ── */
.theme-toggle-button {
  background: var(--bg-button);
  border: calc(var(--base-spacing) * 0.08) solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  font-size: calc(var(--font-size-medium) * 0.75) !important;
  cursor: pointer;
  width:  calc(var(--tap-target) * 0.75) !important;
  height: calc(var(--tap-target) * 0.75 * 0.7) !important;
  min-width:  unset !important;
  min-height: unset !important;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
  /* Prevent tap highlight on mobile */
  -webkit-tap-highlight-color: transparent;
}

.theme-toggle-button:hover  { background: var(--bg-button-hover); }
.theme-toggle-button:active { background: var(--bg-button-active); }

/* ── Audio element (hidden visually, controlled by JS) ── */
.audio-element {
  display: none;
}

/* ── Description text region (main content, scrollable) ── */
.description-region {
  flex: 1 1 0;
  overflow-y: auto;
  padding: var(--spacing-large);
  background-color: var(--bg-description);
  /* Scrollbar styling */
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.description-region::-webkit-scrollbar {
  width: calc(var(--base-spacing) * 0.4);
}
.description-region::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--border-radius);
}
.description-region::-webkit-scrollbar-track {
  background: transparent;
}

/* ── Recording title inside description ── */
.description-recording-title {
  font-size: var(--font-size-large);
  color: var(--color-accent);
  margin-bottom: var(--spacing-medium);
  font-weight: normal;
}

/* ── Description body text ── */
.description-body-text {
  font-size: calc(var(--font-size-medium) * 2);
  color: var(--color-text);
  line-height: calc(var(--font-size-medium) * 2 * var(--golden-ratio));
  white-space: pre-wrap;
}

/* ── Controls footer region ── */
.controls-region {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--spacing-medium) * 0.75);
  padding: calc(var(--spacing-large) * 0.75) calc(var(--spacing-large) * 0.75);
  border-top: calc(var(--base-spacing) * 0.08) solid var(--color-border);
}

/* ── Progress bar ── */
.progress-bar-container {
  width: 100%;
  height: calc(var(--base-spacing) * 0.375);
  background: var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  border-radius: var(--border-radius);
  transition: width 0.25s linear;
  pointer-events: none;
}

/* ── Navigation + controls row ── */
.controls-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-small);
}

/* ── All control buttons ── */
.control-button {
  background: var(--bg-button);
  border: calc(var(--base-spacing) * 0.08) solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  /* Minimum tap target for mobile */
  min-width:  calc(var(--tap-target) * 0.75);
  min-height: calc(var(--tap-target) * 0.75);
  font-size:  calc(var(--icon-size) * 0.75);
  transition: background-color 0.15s ease, transform 0.1s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.control-button:hover  { background: var(--bg-button-hover); }
.control-button:active {
  background: var(--bg-button-active);
  transform: scale(0.95);
}

/* Disabled state (e.g. prev on first, next on last) */
.control-button:disabled {
  opacity: 0.3;
  cursor: default;
  transform: none;
}

/* ── Mobile-first interaction hint ── */
/* Shown when user has not yet interacted (to avoid autoplay block) */
.interaction-prompt-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.82);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-large);
  z-index: 10;
  border-radius: var(--border-radius);
  cursor: pointer;
}

.interaction-prompt-overlay.hidden {
  display: none;
}

.interaction-prompt-icon {
  font-size: calc(var(--base-spacing) * 5);
}

.interaction-prompt-text {
  font-size: var(--font-size-large);
  color: #ffffff;
  text-align: center;
  padding: 0 var(--spacing-large);
}