/* Mix Maker styles. Mobile-first: base styles are for phones, wider screens are added at the bottom. */

:root {
  --bg: #0e1116;
  --surface: #171b22;
  --surface-2: #1f2530;
  --border: #2e3644;
  --text: #eef1f6;
  --text-muted: #a9b1c0;      /* 7.4:1 contrast on --surface */
  --accent: #5eead4;          /* teal, used for waveform and main buttons */
  --accent-strong: #2dd4bf;
  --on-accent: #062a26;       /* dark text on teal buttons */
  --danger: #fca5a5;
  --danger-bg: #3a1a1d;
  --warn-bg: #3a2f14;
  --warn: #fcd34d;
  --focus: #fde68a;

  --radius: 12px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --touch: 44px;              /* minimum size of anything you tap */
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  padding: 0 var(--space-4) env(safe-area-inset-bottom);
}

h1, h2 { line-height: 1.25; margin: 0; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.125rem; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 6px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.icon {
  width: 20px; height: 20px;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}
.icon-lg { width: 36px; height: 36px; }

/* ---------- Header ---------- */

.app-header { max-width: 860px; margin: 0 auto; padding: var(--space-5) 0 var(--space-4); }
.tagline { color: var(--text-muted); margin: var(--space-2) 0 var(--space-3); }

.rights-note {
  display: flex; align-items: center; gap: var(--space-2);
  margin: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--warn-bg);
  color: var(--warn);
  border-radius: var(--radius);
  font-weight: 600;
}

main { max-width: 860px; margin: 0 auto; }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
}
.panel > h2 { margin-bottom: var(--space-3); }

/* ---------- Drop zone ---------- */

.dropzone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-2);
  min-height: 160px;
  padding: var(--space-5) var(--space-4);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface-2);
  text-align: center;
  cursor: pointer;
  color: var(--accent);
  transition: border-color 150ms ease, background-color 150ms ease;
}
.dropzone:hover, .dropzone.is-dragging { border-color: var(--accent); background: #22303a; }
.dropzone:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }
.dropzone-title { font-size: 1.125rem; font-weight: 700; color: var(--text); }
.dropzone-hint { color: var(--text-muted); max-width: 32ch; }

/* ---------- Messages (errors and info) ---------- */

.messages:empty { display: none; }
.messages { margin-top: var(--space-3); display: grid; gap: var(--space-2); }
.message {
  display: flex; align-items: flex-start; gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--danger-bg);
  color: var(--danger);
}
.message p { margin: 0; flex: 1; color: var(--text); }
.message strong { color: var(--danger); }

/* ---------- Song list ---------- */

.list-header { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-2); margin-bottom: var(--space-3); }
.summary { margin: 0; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.empty-state { color: var(--text-muted); margin: 0; }

.song-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }

.song {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
}
.song-top { display: flex; flex-wrap: wrap; align-items: flex-start; gap: var(--space-3); }
.song-number {
  flex-shrink: 0;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
}
.song-info { flex: 1 1 0; min-width: 0; }
/* On phones the buttons get their own row so long song names have room. */
.song-actions { width: 100%; justify-content: flex-end; }
.song-name { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.song-meta { margin: 0; color: var(--text-muted); font-size: 0.9375rem; font-variant-numeric: tabular-nums; }

.song-actions { display: flex; gap: var(--space-1); flex-shrink: 0; }

.icon-btn {
  width: var(--touch); height: var(--touch);
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background-color 120ms ease, transform 80ms ease;
}
.icon-btn:hover:not(:disabled) { background: #2a3240; }
.icon-btn:active:not(:disabled) { transform: scale(0.95); }
.icon-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.icon-btn.danger { color: var(--danger); }

.waveform {
  display: block;
  width: 100%;
  height: 64px;
  margin-top: var(--space-3);
  border-radius: 8px;
  background: #121720;
}

/* Start / End time boxes */
.times {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.time-field label { display: block; font-weight: 600; margin-bottom: var(--space-1); }
.time-field .hint { font-weight: 400; color: var(--text-muted); font-size: 0.875rem; }
.time-field input {
  width: 100%;
  max-width: 10rem;
  min-height: var(--touch);
  padding: 0 var(--space-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 1.0625rem;          /* 16px+ stops iPhones from zooming in */
  font-variant-numeric: tabular-nums;
}
.time-field input:focus-visible { border-color: var(--accent); }
.time-field input[aria-invalid="true"] { border-color: var(--danger); }
.field-note { margin: var(--space-1) 0 0; font-size: 0.875rem; min-height: 0; }
.field-note:empty { display: none; }
.field-note.is-error { color: var(--danger); }
.field-note.is-info { color: var(--warn); }

/* "Cut at 1:31.24 · quiet spot" line under each time box */
.snap-line:empty { display: none; }
.snap-line {
  display: flex; flex-direction: column; align-items: flex-start;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-size: 0.9375rem;
}
.snap-text strong { font-variant-numeric: tabular-nums; }
.quality {
  display: inline-block;
  padding: 0 var(--space-2);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
}
.quality-good { background: #12392f; color: var(--accent); }
.quality-ok { background: #263040; color: var(--text); }
.quality-warn { background: var(--warn-bg); color: var(--warn); }
.btn.btn-small {
  min-height: var(--touch);
  padding: 0 var(--space-3);
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  font-size: 0.875rem;
}
.btn.btn-small:hover { background: var(--surface); }

/* "Transition into next song" strip at the bottom of a card */
.transition {
  margin: var(--space-4) calc(-1 * var(--space-3)) calc(-1 * var(--space-3));
  padding: var(--space-3);
  border-top: 1px dashed var(--border);
  background: #1a2029;
  border-radius: 0 0 var(--radius) var(--radius);
}
.transition[hidden] { display: none; }
.transition fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.transition legend { padding: 0; font-weight: 700; margin-bottom: var(--space-2); overflow-wrap: anywhere; }
.seg { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.seg-option { position: relative; flex: 1 1 auto; }
.seg-option input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.seg-option span {
  display: flex; align-items: center; justify-content: center;
  min-height: var(--touch);
  padding: 0 var(--space-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease;
}
.seg-option span:hover { border-color: var(--accent); }
.seg-option input:checked + span { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.seg-option input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.tr-length { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-3); }
.tr-length[hidden] { display: none; }
.tr-length label { font-weight: 600; }
.tr-length input {
  width: 5rem;
  min-height: var(--touch);
  padding: 0 var(--space-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 1.0625rem;
}
.tr-note { margin: var(--space-2) 0 0; color: var(--text-muted); font-size: 0.9375rem; }

/* The card of the song playing in the whole-mix player */
.song.is-current { border-color: var(--warn); box-shadow: 0 0 0 1px var(--warn); }

/* ---------- Whole-mix panel ---------- */
.mix-top { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-4); }
.btn.btn-big {
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: 52px;
  padding: 0 var(--space-5);
  font-size: 1.125rem;
}
.btn.btn-big .icon { width: 22px; height: 22px; }
.mix-time { margin: 0; font-size: 1.25rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.timeline { margin-top: var(--space-4); }
.segments {
  position: relative;
  height: 28px;
  border-radius: 6px;
  background: #121720;
  overflow: hidden;
}
.segment {
  position: absolute; top: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8125rem; font-weight: 700;
  color: var(--on-accent);
  border-radius: 4px;
}
.seg-0 { background: rgba(94, 234, 212, 0.85); }
.seg-1 { background: rgba(147, 197, 253, 0.8); }
.seek {
  display: block;
  width: 100%;
  height: var(--touch);
  margin: 0;
  accent-color: var(--warn);
  cursor: pointer;
}
.mix-now { margin: var(--space-1) 0 0; color: var(--text-muted); overflow-wrap: anywhere; min-height: 1.5em; }
.mix-jumps { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }
.mix-jumps .btn { display: inline-flex; align-items: center; gap: var(--space-2); flex: 1 1 auto; justify-content: center; }
.mix-jumps .btn:disabled { opacity: 0.4; cursor: not-allowed; }
.jump-wrap[hidden] { display: none; }
.jump-title { margin: var(--space-4) 0 var(--space-2); font-weight: 600; }
.jump-title .hint { font-weight: 400; color: var(--text-muted); font-size: 0.875rem; }
.jump-list {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-2);
}
.jump-btn {
  width: 100%;
  display: flex; flex-direction: column; align-items: flex-start;
  padding: var(--space-2) var(--space-3);
  line-height: 1.3;
}
.jump-btn span { font-weight: 400; color: var(--text-muted); font-size: 0.875rem; }

/* ---------- Save panel ---------- */
.text-field { margin-bottom: var(--space-4); }
.text-field label { display: block; font-weight: 600; margin-bottom: var(--space-1); }
.text-field input, .text-field select {
  width: 100%;
  max-width: 24rem;
  min-height: var(--touch);
  padding: 0 var(--space-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 1.0625rem;
}
.text-field[hidden] { display: none; }
.format-field { border: 0; margin: 0 0 var(--space-4); padding: 0; min-width: 0; }
.format-field legend { padding: 0; font-weight: 600; margin-bottom: var(--space-2); }
.seg-option input:disabled + span { opacity: 0.4; cursor: not-allowed; }
.save-info { color: var(--text-muted); margin: 0 0 var(--space-3); overflow-wrap: anywhere; }
.save-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }
.save-actions .btn:disabled { opacity: 0.5; cursor: not-allowed; }
.save-actions .btn[hidden] { display: none; }
.save-progress { margin-top: var(--space-4); }
.save-progress[hidden] { display: none; }
.save-progress progress {
  width: 100%;
  height: 16px;
  accent-color: var(--accent);
}
.progress-text { margin: var(--space-2) 0 0; font-variant-numeric: tabular-nums; }
.save-done { margin-top: var(--space-4); padding: var(--space-3); border-radius: var(--radius); }
.save-done[hidden] { display: none; }
.save-done p { margin: 0 0 var(--space-2); overflow-wrap: anywhere; }
.save-done.is-ok { background: #12392f; color: var(--text); }
.save-done.is-error { background: var(--danger-bg); color: var(--danger); }
.save-done .btn { display: inline-flex; align-items: center; text-decoration: none; }

/* Small player bar fixed to the bottom of the screen */
.mini-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4) calc(var(--space-2) + env(safe-area-inset-bottom));
  background: #222a36;
  border-top: 1px solid var(--border);
  box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.4);
  z-index: 9;
}
.mini-bar[hidden] { display: none; }
.mini-play { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.mini-play:hover:not(:disabled) { background: var(--accent-strong); }
.mini-info { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.mini-time { font-weight: 700; font-variant-numeric: tabular-nums; }
.mini-song { color: var(--text-muted); font-size: 0.875rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
body:has(.mini-bar:not([hidden])) .toast { bottom: calc(76px + env(safe-area-inset-bottom)); }
body:has(.mini-bar:not([hidden])) { padding-bottom: 76px; }

/* Quiet-point settings */
.settings {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
}
.settings-title { margin: 0; font-weight: 700; }
.settings-help { margin: var(--space-1) 0 var(--space-3); color: var(--text-muted); font-size: 0.9375rem; }
.settings-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-5); }
.check { display: inline-flex; align-items: center; gap: var(--space-2); min-height: var(--touch); cursor: pointer; }
.check input { width: 22px; height: 22px; accent-color: var(--accent); }
.window-field { display: inline-flex; align-items: center; gap: var(--space-2); }
.window-field input {
  width: 5rem;
  min-height: var(--touch);
  padding: 0 var(--space-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 1.0625rem;
}
.window-field input:disabled { opacity: 0.5; }

/* Preview buttons */
.preview-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.preview-row .btn { display: inline-flex; align-items: center; gap: var(--space-2); }
.preview-row .btn .icon { width: 16px; height: 16px; }
.btn[aria-pressed="true"] { background: var(--warn); color: #2a2106; }
.btn-ghost[aria-pressed="true"] { border-color: var(--warn); }
.btn.btn-link {
  background: transparent;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0 var(--space-2);
}
.btn.btn-link:hover { background: transparent; color: var(--text); }
.btn.btn-link[hidden] { display: none; }

/* Loading card */
.song.is-loading .song-meta { display: flex; align-items: center; gap: var(--space-2); }
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Buttons ---------- */

.btn {
  min-height: var(--touch);
  padding: 0 var(--space-4);
  border: 0;
  border-radius: 10px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--accent);
  color: var(--on-accent);
}
.btn:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--surface-2); }

/* ---------- Toast (small pop-up at the bottom) ---------- */

.toast {
  position: fixed;
  left: 50%; bottom: calc(var(--space-4) + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--space-4));
  max-width: 480px;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  background: #e9edf3;
  color: #10141a;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  z-index: 10;
}
.toast[hidden] { display: none; }
.toast .btn-ghost { color: #0d5c54; border-color: #9aa4b2; }
.toast .btn-ghost:hover { background: #d7dde6; }

/* ---------- Footer ---------- */

.app-footer { max-width: 860px; margin: 0 auto; padding: var(--space-4) 0 var(--space-6); color: var(--text-muted); font-size: 0.9375rem; }

.app-footer p { margin: 0 0 var(--space-2); }
.app-footer a { color: var(--accent); text-underline-offset: 3px; display: inline-block; min-height: var(--touch); line-height: var(--touch); padding: 0 var(--space-1); }

/* Privacy page */
.prose h2 { margin: var(--space-5) 0 var(--space-2); }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--text); max-width: 65ch; }
.prose ul { padding-left: 1.25rem; }
.back-link { display: inline-flex; align-items: center; text-decoration: none; margin-top: var(--space-3); }
.app-footer .credits { font-size: 0.8125rem; }

/* ---------- Bigger screens ---------- */

@media (min-width: 640px) {
  body { padding-left: var(--space-5); padding-right: var(--space-5); }
  h1 { font-size: 2rem; }
  .panel { padding: var(--space-5); }
  .waveform { height: 80px; }
  .song-top { flex-wrap: nowrap; }
  .song-actions { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; transition-duration: 1ms !important; }
}