/* App-specific layout. Colors, type and effects come from tokens.css / components.css. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--color-bg);
  color: var(--color-text);
  font: var(--font-body);
}

h1,
h2,
p {
  margin: 0;
}

.layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 30rem;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
  padding:
    calc(var(--space-8) + env(safe-area-inset-top))
    calc(var(--space-5) + env(safe-area-inset-right))
    calc(var(--space-6) + env(safe-area-inset-bottom))
    calc(var(--space-5) + env(safe-area-inset-left));
}

@media (min-width: 48rem) {
  body {
    display: grid;
    place-items: center;
    padding: var(--space-10) var(--space-6);
  }

  .layout {
    width: 100%;
    min-height: 0;
    padding: var(--space-10) var(--space-10) var(--space-8);
    border-radius: var(--radius-xl);
    background: var(--color-surface);
    box-shadow: var(--drop-4), var(--bevel-lg);
  }
}

.lead {
  margin-top: var(--space-2);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.noise-group {
  display: grid;
  gap: var(--space-4);
}

.noise-text {
  display: flex;
  flex: 1;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.volume {
  display: grid;
  gap: var(--space-2);
}

.volume-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

#volume-value {
  font-variant-numeric: tabular-nums;
}

.play-area {
  display: flex;
  justify-content: center;
  padding: var(--space-2) 0 var(--space-4);
}

.ui-button.play-button {
  position: relative;
  flex-direction: column;
  gap: var(--space-1);
  width: 136px;
  box-shadow: var(--elevation-5);
}

@media (hover: hover) {
  .ui-button.play-button:hover {
    box-shadow: var(--elevation-5), var(--shadow-glow);
  }
}

.ui-button.play-button:focus-visible {
  box-shadow: var(--elevation-5), var(--shadow-glow);
}

/* Playing reads as "pushed in" with a slow breathing glow, not as a color change alone. */
.ui-button.play-button[data-playing="true"] {
  background: var(--color-primary-soft);
  color: var(--color-text);
  box-shadow: var(--shadow-inset);
  transform: none;
}

.play-button::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--easing-standard);
}

.play-button[data-playing="true"]::after {
  opacity: 0.5;
  animation: breathe var(--duration-breath) var(--easing-breath) infinite alternate;
}

@keyframes breathe {
  from { opacity: 0.35; }
  to { opacity: 0.7; }
}

@media (prefers-reduced-motion: reduce) {
  .play-button[data-playing="true"]::after {
    animation: none;
  }
}

.play-icon {
  width: var(--space-10);
  height: var(--space-10);
  fill: currentColor;
}

.play-button[data-playing="true"] .play-icon--play,
.play-button[data-playing="false"] .play-icon--stop {
  display: none;
}

.status-alert:not(.ui-alert--warning, .ui-alert--error),
.status-alert:not(.ui-alert--warning) .status-icon--warning,
.status-alert:not(.ui-alert--error) .status-icon--error {
  display: none;
}

.footer {
  margin-top: auto;
}