/* Base Theme */

:root {
  color-scheme: light dark;

  /* Light is the base, and follows the iOS grouped style: a gray page, white
     cards on it. Every text pair here clears 4.5:1. */
  --accent: #356fd9;          /* white on it is 4.7:1, so it can carry text */
  --bg: #e9eaf0;
  --card: #fff;
  --edge: #d1d1d6;
  --ink: #1c1c1e;
  --ink-bright: #fff;         /* what sits on the accent, in either theme */
  --lift: 0 1px 2px var(--shadow), 0 2px 8px -2px var(--shadow);   /* soft and low, so a button rises without an edge */
  --muted: #58585d;
  --outline: #8a8f9c;         /* a border that has to be seen, 3:1 */
  --playing: #c4eed7;         /* the green a playing card fades in from */
  --radius-lg: 16px;
  --radius-xl: 28px;
  --raised: #e3e5ec;
  --scrim: rgba(0, 0, 0, .35);
  --shadow: rgba(0, 0, 0, .18);
  --shade: rgba(0, 0, 0, .06);
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  /* Rems off the root, written as px / 17 (see html below) so they scale
     with Dynamic Type; md is the body size. */
  --text-2xs: calc(11rem / 17);
  --text-xs: calc(13rem / 17);
  --text-sm: calc(15rem / 17);
  --text-md: calc(17rem / 17);
  --text-lg: calc(20rem / 17);
  --text-xl: calc(24rem / 17);
  --toast-bad-bg: #fde8e6;
  --toast-bad-edge: #f3b8b2;
  --toast-bad-ink: #7a1a12;
  --toast-ok-bg: #e4f6ec;
  --toast-ok-edge: #a8dcc0;
  --toast-ok-ink: #14532d;
  --track: #b6bbc8;           /* the empty part of the volume meter */
  --warn: #c4231b;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0d14;
    --card: #151a25;
    --edge: #232b3b;
    --ink: #eef2f9;
    --muted: #98a3b8;
    --outline: #5f6b87;
    --playing: #1f4a42;
    --raised: #29334a;
    --scrim: rgba(4, 6, 11, .6);
    --shadow: rgba(0, 0, 0, .45);
    --shade: rgba(255, 255, 255, .05);
    --toast-bad-bg: #2b1f24;
    --toast-bad-edge: #52303a;
    --toast-bad-ink: #ffd9d4;
    --toast-ok-bg: #172a21;
    --toast-ok-edge: #2a5540;
    --toast-ok-ink: #c9f7df;
    --track: #3a4660;
    --warn: #ff7a6b;
  }
}

/* Increase Contrast in iOS' Accessibility settings. */
@media (prefers-contrast: more) {
  :root {
    --muted: var(--ink);
    --edge: var(--outline);
    --track: var(--outline);
  }
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

[hidden] { display: none !important; }

/* Dynamic Type: on iOS the root takes the size the user chose in Settings
   (17px at the default), and the --text-* sizes above are rems off it. */
html { background: var(--bg); font-size: 17px; }
@supports (font: -apple-system-body) {
  html { font: -apple-system-body; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 1rem/1.4 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
  overscroll-behavior-y: contain;
}

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  touch-action: manipulation;
  box-shadow: var(--lift);
}
button:active { transform: scale(.96); }
button[aria-pressed="true"], button[aria-current="true"] { box-shadow: none; }

/* For a keyboard, including the one on an iPad, and VoiceOver's cursor. */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

svg { width: 22px; height: 22px; fill: currentColor; }

.app {
  max-width: 520px;
  margin: 0 auto;
  padding: max(var(--space-lg), env(safe-area-inset-top)) max(var(--space-lg), env(safe-area-inset-right))
           max(var(--space-xl), env(safe-area-inset-bottom)) max(var(--space-lg), env(safe-area-inset-left));
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.wide { width: 100%; min-height: 50px; border-radius: var(--radius-lg); font-size: var(--text-sm); }
.ghost { background: transparent; border: 1px solid var(--outline); color: var(--muted); box-shadow: none; }   /* nothing to lift */

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise { from { transform: translateY(14%); opacity: .4; } }

/* Header */

header { order: -2; display: flex; align-items: center; justify-content: center; }
header .logo { height: 44px; width: auto; display: block; margin: var(--space-xs); }
/* The mark is drawn white, for a dark page. */
@media (prefers-color-scheme: light) {
  header .logo { filter: invert(1); }
}

/* Card */

/* A playing card goes to the top. order does not transition, so the swap
   rides on a view transition instead -- see placeCards() in app.js. */
.app > .on-top { order: -1; }

::view-transition-group(*) {
  animation-duration: .4s;
  animation-timing-function: cubic-bezier(.22, 1, .36, 1);
}

.card {
  background: var(--card);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.card.offline { opacity: .5; }
.card.room.playing, .card.avr.playing {
  background: linear-gradient(135deg, var(--playing) 0%, var(--card) 70%);
}

.card-head { display: flex; align-items: center; justify-content: center; gap: var(--space-md); }
.card-head h2 {
  display: flex; align-items: center; gap: var(--space-md);
  margin: var(--space-sm); min-width: 0;
  font-size: var(--text-lg); font-weight: 600;
}
.card-head h2 .room-icon { flex: 0 0 auto; height: 20px; width: auto; fill: currentColor; }
.card-head h2 .room-label { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Card - Media being played */

.media {
  background: var(--shade);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: flex;
  row-gap: var(--space-md);
  flex-direction: column;
}

.now-playing {
  display: flex; align-items: center; gap: var(--space-md); min-width: 0;
}
.cover {
  flex: 0 0 auto;
  width: 62px; height: 62px;
  border-radius: 13px;
  object-fit: cover;
  background: var(--raised);
}
.cover.poster { width: 50px; height: 75px; border-radius: 9px; }
.track { display: flex; flex-direction: column; min-width: 0; }
.track span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.song { font-size: var(--text-md); font-weight: 600; }
.artist { font-size: var(--text-sm); color: var(--muted); }
.progress { display: flex; align-items: center; gap: var(--space-md); }
.progress-line { position: relative; flex: 1; height: 3px; border-radius: 2px; background: var(--muted); }
.progress-fill {
  display: block; height: 100%; width: calc(var(--progress, 0) * 1%);
  border-radius: 999px; background: var(--muted);
  transition: width .12s ease-out;
}
.progress-cursor {
  display: none;
  position: absolute; top: 50%;
  left: calc(var(--progress, 0) * 1%);
  width: 7px; height: 7px; margin-left: -3.5px;
  border-radius: 50%; background: var(--muted);
  transform: translateY(-50%);
  transition: left .12s ease-out;
}
.progress-time,
.progress-total {
  display: none;
  font-size: var(--text-xs); line-height: 1; color: var(--muted);
  font-variant-numeric: tabular-nums; white-space: nowrap;
}
.progress-time {
  position: absolute;
  left: clamp(var(--half, 0px), calc(var(--progress, 0) * 1%), calc(100% - var(--half, 0px)));
  transform: translateX(-50%);
  transition: left .12s ease-out;
}
.progress-time.elapsed { bottom: 9px; }
.progress-time.remaining { top: 9px; }
/* Room for the labels above and below the cursor: what they need at 13px,
   plus whatever a larger Dynamic Type size adds to them. */
.progress.known { padding: calc(var(--space-md) + max(0px, var(--text-xs) - 13px)) 0; }
.progress.known .progress-cursor,
.progress.known .progress-time,
.progress.known .progress-total { display: block; }
.progress.seekable .progress-cursor,
.progress.seekable .progress-time { cursor: grab; touch-action: pan-y; }
/* The cursor is 7px; this grows what a finger can grab to the 44pt Apple asks for. */
.progress.seekable .progress-cursor::before { content: ''; position: absolute; inset: -19px; }
.progress.dragging .progress-cursor,
.progress.dragging .progress-time { transition: none; cursor: grabbing; }
.progress.dragging .progress-cursor { background: var(--ink); transform: translateY(-50%) scale(1.6); }
.progress.dragging .progress-time { color: var(--ink); }

/* Card - Volume */

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

.control-btn {
  flex: 0 0 auto;
  width: 72px; height: 62px;
  border-radius: var(--radius-lg);
  background: var(--raised);
  display: grid; place-items: center;
}
.control-btn svg { width: 20px; height: 20px; }
.control-btn:disabled { opacity: .5; }

.meter { position: relative; flex: 1; height: 8px; border-radius: 4px; background: var(--track); }
.meter i {
  display: block; height: 100%; width: calc(var(--level, 0) * 1%);
  border-radius: 999px; background: var(--accent);
  transition: width .12s ease-out;
}

.knob {
  position: absolute; top: 50%;
  left: calc((100% - 46px) * var(--level, 0) / 100);
  width: 46px; height: 30px;
  transform: translateY(-50%);
  display: grid; place-items: center;
  border-radius: 999px;
  background: var(--accent); color: var(--ink-bright);
  box-shadow: 0 1px 4px var(--shadow);
  /* Left in px: the number has to fit a pill whose size the meter's maths
     (see the left: above) knows. */
  font-size: 14px; font-weight: 600; font-variant-numeric: tabular-nums;
  transition: left .12s ease-out;
  cursor: grab;
  touch-action: none;   /* the drag is ours, not a page scroll */
}
.knob::before { /* A thumb-sized grip around a knob only 30px tall. A press on the pseudo-element lands on the knob itself. */
	content: '';
	position: absolute;
	inset: calc(var(--space-md) * -1) calc(var(--space-sm) * -1);
}
.meter.dragging i,
.meter.dragging .knob { transition: none; }
.meter.dragging .knob { cursor: grabbing; transform: translateY(-50%) scale(1.12); }

/* Card - Navigation */

.actions { display: flex; align-items: stretch; justify-content: center; gap: var(--space-md); }

.control-btn .icon-pause { display: none; }
.control-btn.playing .icon-play { display: none; }
.control-btn.playing .icon-pause { display: block; }

/* Card - Sources */

.sources { display: flex; gap: var(--space-md); }
.sources-btn {
  flex: 1; min-width: 0;
  min-height: 50px; border-radius: var(--radius-lg);
  background: var(--raised);
  display: flex; align-items: center; justify-content: center; gap: var(--space-sm);
  font-size: var(--text-sm); font-weight: 600;
}
.sources-btn:disabled { opacity: .5; }
.sources-btn svg { flex: 0 0 auto; }
.sources-btn span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sources-btn .spinner { display: none; }
button.sources-btn.loading .icon { display: none; }
.sources-btn.loading .spinner { display: block; animation: spin 1s steps(8) infinite; }

.spotify[aria-pressed="true"] { border: 2px solid var(--ink); }

.toggle .leave { display: none; }
.toggle[aria-pressed="true"] { background: var(--accent); color: var(--ink-bright); }

/* AVR */

/* AVR - Input */

.input-select {
  display: flex; align-items: center; gap: var(--space-md);
  width: 100%; min-height: 50px;
  padding: var(--space-md) var(--space-md);
  border-radius: var(--radius-lg);
  background: var(--raised);
  text-align: left;
}
.input-select .eyebrow { font-size: var(--text-2xs); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.input-select [data-role="input-icon"] { flex: 0 0 auto; height: 18px; width: 18px; fill: currentColor; color: var(--muted); }
.input-select .value { flex: 1; font-size: var(--text-lg); font-weight: 600; }
.input-select .chevron { color: var(--muted); }

.sheet-wrap { position: fixed; inset: 0; z-index: 10; display: flex; flex-direction: column; justify-content: flex-end; }
.scrim { position: absolute; inset: 0; background: var(--scrim); backdrop-filter: blur(3px); }

.sheet {
  position: relative;
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: var(--space-md) var(--space-md) calc(var(--space-md) + env(safe-area-inset-bottom));
  max-height: 82vh;
  display: flex; flex-direction: column; gap: var(--space-md);
  animation: rise .22s cubic-bezier(.22, .68, .3, 1);
}

.grabber { width: 38px; height: 4px; border-radius: 999px; background: var(--outline); margin: var(--space-xs) auto var(--space-xs); }
.sheet h3 { margin: 0 var(--space-xs); font-size: var(--text-xs); font-weight: 600; color: var(--muted); }

.options { display: flex; flex-direction: column; gap: var(--space-sm); overflow-y: auto; -webkit-overflow-scrolling: touch; }
.option {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-md);
  min-height: 58px; padding: 0 var(--space-md);
  border-radius: var(--radius-lg); background: var(--raised);
  font-size: var(--text-md); text-align: left;
}
.option[aria-current="true"] { background: var(--accent); color: var(--ink-bright); }
.option-label { display: flex; align-items: center; gap: var(--space-md); min-width: 0; overflow: hidden; }
.option-label svg { flex: 0 0 auto; height: 18px; width: 18px; fill: currentColor; color: var(--muted); }
.option-label span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.option[aria-current="true"] .option-label svg { color: var(--ink-bright); }
.option .code { font-size: var(--text-xs); color: var(--muted); flex: 0 0 auto; }
.option[aria-current="true"] .code { color: var(--ink-bright); }

/* AVR - Grouped Room */

.joined { display: flex; flex-direction: column; gap: var(--space-md); }
.joined .card.room { background: none; border-color: var(--ink); border-radius: var(--radius-lg); padding: var(--space-md); gap: var(--space-md); }
.joined .card-head h2 { font-size: var(--text-sm); font-weight: 600; color: var(--muted); }
.joined .cover { width: 52px; height: 52px; border-radius: 10px; }
.joined .song { font-size: var(--text-md); }
.joined .step { height: 54px; }
.joined .toggle[aria-pressed="true"] { background: var(--raised); color: inherit; box-shadow: var(--lift); }   /* an action here, not a state */
.joined .toggle .cinema { display: none; }
.joined .toggle .leave { display: block; }

/* Footer */

footer { margin: var(--space-xs) var(--space-xs) 0; min-height: 18px; font-size: var(--text-xs); color: var(--muted); text-align: center; }
footer.bad { color: var(--warn); }

/* Toast */

.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(22px + env(safe-area-inset-bottom));
  z-index: 20; max-width: 90vw;
  padding: var(--space-md) var(--space-md); border-radius: 14px;
  background: var(--toast-bad-bg); border: 1px solid var(--toast-bad-edge); color: var(--toast-bad-ink);
  font-size: var(--text-sm); box-shadow: 0 10px 30px var(--shadow);
}
.toast.ok { background: var(--toast-ok-bg); border-color: var(--toast-ok-edge); color: var(--toast-ok-ink); }