/* ===== Lärm-Fokus – ruhiges, dunkles Indigo-Design ===== */
*, *::before, *::after { box-sizing: border-box; }

:root {
  --lf-bg: #0f172a;
  --lf-bg-2: #1e293b;
  --lf-surface: #1e293b;
  --lf-surface-2: #273449;
  --lf-border: #334155;
  --lf-text: #e2e8f0;
  --lf-text-dim: #94a3b8;
  --lf-text-faint: #64748b;
  --lf-indigo: #818cf8;
  --lf-indigo-2: #6366f1;
  --lf-indigo-soft: rgba(129, 140, 248, 0.16);
  --lf-accent: #a5b4fc;
  --lf-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --lf-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.30);
  --lf-radius: 18px;
  --lf-radius-sm: 12px;
  --lf-focus: #c7d2fe;
}

[data-theme="light"] {
  --lf-bg: #eef1f8;
  --lf-bg-2: #ffffff;
  --lf-surface: #ffffff;
  --lf-surface-2: #f1f3fb;
  --lf-border: #d8def0;
  --lf-text: #1e293b;
  --lf-text-dim: #51607a;
  --lf-text-faint: #7c8aa5;
  --lf-indigo: #6366f1;
  --lf-indigo-2: #4f46e5;
  --lf-indigo-soft: rgba(99, 102, 241, 0.12);
  --lf-accent: #4f46e5;
  --lf-shadow: 0 10px 30px rgba(30, 41, 59, 0.12);
  --lf-shadow-sm: 0 4px 14px rgba(30, 41, 59, 0.08);
  --lf-focus: #4f46e5;
}

html, body { margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, var(--lf-indigo-soft), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, var(--lf-indigo-soft), transparent 55%),
    var(--lf-bg);
  color: var(--lf-text);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.5;
  padding:
    env(safe-area-inset-top) env(safe-area-inset-right)
    env(safe-area-inset-bottom) env(safe-area-inset-left);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--lf-indigo-2);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* ===== Header ===== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 18px 8px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  flex: 0 0 auto;
  border-radius: 13px;
  color: #fff;
  background: linear-gradient(150deg, var(--lf-indigo), var(--lf-indigo-2));
  box-shadow: var(--lf-shadow-sm);
}
.brand-text { min-width: 0; }
.brand h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.brand-sub {
  margin: 0;
  font-size: 0.8rem;
  color: var(--lf-text-dim);
}

.icon-btn {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--lf-border);
  background: var(--lf-surface);
  color: var(--lf-text);
  cursor: pointer;
  transition: background .2s, border-color .2s, transform .1s;
}
.icon-btn:hover { background: var(--lf-surface-2); }
.icon-btn:active { transform: scale(0.96); }
.icon-btn .ico-sun { display: none; }
[data-theme="light"] .icon-btn .ico-moon { display: none; }
[data-theme="light"] .icon-btn .ico-sun { display: block; }

/* ===== Main ===== */
.app-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 18px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.autoplay-hint {
  background: var(--lf-indigo-soft);
  border: 1px solid var(--lf-border);
  border-radius: var(--lf-radius-sm);
  padding: 12px 14px;
}
.autoplay-hint p { margin: 0; font-size: 0.85rem; color: var(--lf-text-dim); }
.autoplay-hint strong { color: var(--lf-accent); }
.autoplay-hint.is-hidden { display: none; }

/* ===== Master panel ===== */
.master-panel {
  background: var(--lf-surface);
  border: 1px solid var(--lf-border);
  border-radius: var(--lf-radius);
  box-shadow: var(--lf-shadow);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}

.master-btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  border: none;
  cursor: pointer;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 16px 34px;
  border-radius: 999px;
  background: linear-gradient(150deg, var(--lf-indigo), var(--lf-indigo-2));
  box-shadow: 0 8px 26px rgba(99, 102, 241, 0.45);
  transition: transform .12s, box-shadow .2s, filter .2s;
}
.master-btn:hover { filter: brightness(1.06); }
.master-btn:active { transform: scale(0.97); }
.master-icon {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}
.master-btn .ico-stop { display: none; }
.master-btn.is-playing .ico-play { display: none; }
.master-btn.is-playing .ico-stop { display: block; }
.master-btn.is-playing {
  background: linear-gradient(150deg, #f87171, #ef4444);
  box-shadow: 0 8px 26px rgba(239, 68, 68, 0.40);
}

.master-volume {
  width: 100%;
  max-width: 460px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 12px;
}
.master-volume label {
  grid-column: 1 / -1;
  font-size: 0.85rem;
  color: var(--lf-text-dim);
  font-weight: 600;
}
.master-volume output {
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  color: var(--lf-accent);
  min-width: 3.2ch;
  text-align: right;
}

/* ===== Range slider ===== */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 26px;
  background: transparent;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--lf-indigo) var(--_fill, 70%), var(--lf-surface-2) var(--_fill, 70%));
  border: 1px solid var(--lf-border);
}
input[type="range"]::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: var(--lf-surface-2);
  border: 1px solid var(--lf-border);
}
input[type="range"]::-moz-range-progress {
  height: 8px;
  border-radius: 999px;
  background: var(--lf-indigo);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  margin-top: -7px;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--lf-indigo-2);
  box-shadow: var(--lf-shadow-sm);
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--lf-indigo-2);
  box-shadow: var(--lf-shadow-sm);
}
input[type="range"]:disabled { cursor: not-allowed; opacity: 0.55; }

/* ===== Sounds ===== */
.section-title {
  margin: 0 0 2px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--lf-text);
}
.sound-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.sound-card {
  background: var(--lf-surface);
  border: 1px solid var(--lf-border);
  border-radius: var(--lf-radius);
  box-shadow: var(--lf-shadow-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color .2s, box-shadow .2s, transform .12s;
}
.sound-card.is-active {
  border-color: var(--lf-indigo);
  box-shadow: 0 0 0 1px var(--lf-indigo), var(--lf-shadow-sm);
}

.sound-top {
  display: flex;
  align-items: center;
  gap: 12px;
}
.sound-glyph {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--lf-surface-2);
  color: var(--lf-indigo);
}
.sound-card.is-active .sound-glyph {
  background: var(--lf-indigo-soft);
}
.sound-meta { min-width: 0; flex: 1; }
.sound-name {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
}
.sound-desc {
  margin: 0;
  font-size: 0.78rem;
  color: var(--lf-text-dim);
}

/* Toggle switch */
.switch {
  flex: 0 0 auto;
  position: relative;
  display: inline-block;
  width: 48px; height: 28px;
}
.switch input {
  position: absolute;
  opacity: 0;
  width: 100%; height: 100%;
  margin: 0;
  cursor: pointer;
}
.switch .track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: var(--lf-surface-2);
  border: 1px solid var(--lf-border);
  transition: background .2s, border-color .2s;
}
.switch .knob {
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--lf-text-faint);
  transition: transform .2s, background .2s;
}
.switch input:checked ~ .track {
  background: var(--lf-indigo-2);
  border-color: var(--lf-indigo-2);
}
.switch input:checked ~ .knob {
  transform: translateX(20px);
  background: #fff;
}
.switch input:focus-visible ~ .track {
  outline: 3px solid var(--lf-focus);
  outline-offset: 2px;
}

.sound-vol {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 10px;
}
.sound-vol .vol-label {
  grid-column: 1 / -1;
  font-size: 0.74rem;
  color: var(--lf-text-faint);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.sound-vol output {
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  color: var(--lf-accent);
  min-width: 3.2ch;
  text-align: right;
}

/* ===== Timer ===== */
.timer-panel {
  background: var(--lf-surface);
  border: 1px solid var(--lf-border);
  border-radius: var(--lf-radius);
  box-shadow: var(--lf-shadow-sm);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.timer-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.timer-status {
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--lf-accent);
}
.timer-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  border: 1px solid var(--lf-border);
  background: var(--lf-surface-2);
  color: var(--lf-text);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .1s;
}
.chip:hover { border-color: var(--lf-indigo); }
.chip:active { transform: scale(0.96); }
.chip.is-selected {
  background: var(--lf-indigo-2);
  border-color: var(--lf-indigo-2);
  color: #fff;
}
.timer-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--lf-text-faint);
}

/* ===== Footer ===== */
.app-footer p {
  margin: 0;
  font-size: 0.78rem;
  color: var(--lf-text-faint);
  text-align: center;
}

/* ===== Toasts ===== */
.toast-wrap {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 200;
  width: min(92vw, 420px);
  pointer-events: none;
}
.toast {
  background: var(--lf-surface-2);
  color: var(--lf-text);
  border: 1px solid var(--lf-border);
  border-left: 4px solid var(--lf-indigo);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.88rem;
  box-shadow: var(--lf-shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* ===== Focus visibility ===== */
:focus-visible {
  outline: 3px solid var(--lf-focus);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== Small screens ===== */
@media (max-width: 420px) {
  .app-header { padding: 16px 14px 6px; }
  .app-main { padding: 6px 14px 32px; }
  .brand h1 { font-size: 1.2rem; }
  .sound-grid { grid-template-columns: 1fr; }
  .master-btn { padding: 14px 26px; font-size: 1rem; }
}