/* ─────────────────────────────────────────────
   Bhāṣā — Layout
   Structure only. All colours via tokens.
───────────────────────────────────────────── */

/* Critical: prevent .screen { display:flex } from overriding the hidden attribute */
[hidden] { display: none !important; }

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  overscroll-behavior: none;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: var(--font-size-lg);
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── App container — centered column ── */
#app {
  position: relative;
  width: 100%;
  max-width: 768px;
  height: 100vh;   /* fallback for Safari < 15.4 */
  height: 100dvh;  /* dynamic viewport — hides with browser chrome on iOS */
  margin: 0 auto;
  background: var(--color-bg);
  overflow: hidden;
}

/* ── Screens ── */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  overflow: hidden;
}

/* ── App bar ── */
.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: max(52px, calc(env(safe-area-inset-top) + 16px));
  padding-bottom: var(--space-lg);
  padding-left: var(--space-xl);
  padding-right: var(--space-xl);
  flex-shrink: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

/* ── Bottom bar ── */
.bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  padding-bottom: max(36px, calc(env(safe-area-inset-bottom) + 16px));
  padding-left: var(--space-2xl);
  padding-right: var(--space-2xl);
  flex-shrink: 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

/* ── Mic wrapper — centred with rings ── */
.mic-wrapper {
  position: relative;
  width: 96px;
  height: 96px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-rings {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ── Home screen ── */
#home-screen .home-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  overflow-y: auto;
}

/* ── Chat screen ── */
#chat-screen .chat-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.chat-messages {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-lg) var(--space-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  z-index: 1;
}

#wave-canvas {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 40%;
  pointer-events: none;
  opacity: 0.4;
  display: none;
  z-index: 0;
}

/* ── Settings screen ── */
.settings-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: var(--space-lg) var(--space-xl);
  padding-bottom: max(40px, calc(env(safe-area-inset-bottom) + 24px));
}

/* ── Onboarding screen ── */
.onboarding-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  padding-top: max(64px, calc(env(safe-area-inset-top) + 32px));
  padding-bottom: max(48px, calc(env(safe-area-inset-bottom) + 24px));
  overflow-y: auto;
}

.onboarding-steps {
  width: 100%;
  max-width: 380px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.onboarding-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  width: 100%;
}

.onboarding-dots {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  padding-top: var(--space-xl);
}

/* ── Unlock screen ── */
.unlock-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
  padding-top: max(64px, calc(env(safe-area-inset-top) + 32px));
}