/* ==========================================================================
   Hearth AI - Components
   Reusable UI building blocks. Mobile-first. Touch targets >= 44px.
   ========================================================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }
body {
  margin: 0;
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; padding: 0; color: inherit; }
input, select, textarea { font-family: inherit; font-size: inherit; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--color-text-link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Typography classes ---------- */
.text-display {
  font-family: var(--font-family-display);
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}
.text-h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}
.text-h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-snug);
  letter-spacing: var(--letter-spacing-tight);
}
.text-h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-snug);
}
.text-lead {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-soft);
}
.text-body {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}
.text-small {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-text-soft);
}
.text-caption {
  font-size: var(--font-size-xs);
  line-height: var(--line-height-snug);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}
.text-eyebrow {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  color: var(--color-text-muted);
}
.text-soft { color: var(--color-text-soft); }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary-500); }
.text-accent { color: var(--color-accent-400); }

/* ---------- Layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container-default);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.container-narrow { max-width: var(--container-narrow); }
.container-wide { max-width: var(--container-wide); }

.stack { display: flex; flex-direction: column; }
.stack-2 { gap: var(--space-2); }
.stack-3 { gap: var(--space-3); }
.stack-4 { gap: var(--space-4); }
.stack-5 { gap: var(--space-5); }
.stack-6 { gap: var(--space-6); }
.stack-8 { gap: var(--space-8); }
.row { display: flex; flex-direction: row; align-items: center; }
.row-2 { gap: var(--space-2); }
.row-3 { gap: var(--space-3); }
.row-4 { gap: var(--space-4); }
.between { justify-content: space-between; }
.center { justify-content: center; align-items: center; }
.grow { flex: 1; }
.wrap { flex-wrap: wrap; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }

/* ---------- Page shell ---------- */
.page {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  padding-bottom: var(--safe-area-bottom);
}

.page-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-5);
  background: rgba(250, 247, 242, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.page-content {
  flex: 1;
  padding: var(--space-5);
  padding-bottom: calc(var(--space-8) + var(--safe-area-bottom));
}

.page-centered {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-6) var(--space-5);
  max-width: var(--container-narrow);
  margin: 0 auto;
  width: 100%;
}

/* ---------- Button ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 52px;            /* >= 44px iOS, generous tap target */
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-spring),
              background var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  overflow: hidden;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--color-primary-500);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-600);
  box-shadow: var(--shadow-md);
}
.btn-primary.btn-ember {
  background: linear-gradient(135deg, var(--color-accent-400), var(--color-accent-500));
  box-shadow: var(--shadow-ember);
}
.btn-primary.btn-ember:hover:not(:disabled) {
  box-shadow: var(--shadow-ember-lg);
}

.btn-secondary {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-soft);
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg-soft);
  color: var(--color-text);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}

.btn-block { width: 100%; }
.btn-lg { min-height: 60px; font-size: var(--font-size-md); padding: var(--space-4) var(--space-6); }
.btn-sm { min-height: 40px; font-size: var(--font-size-sm); padding: var(--space-2) var(--space-4); }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  color: var(--color-text-soft);
  transition: background var(--duration-fast) var(--ease-out);
}
.btn-icon:hover { background: var(--color-bg-soft); color: var(--color-text); }

/* ---------- Input ---------- */
.input-group { display: flex; flex-direction: column; gap: var(--space-2); }
.input-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-soft);
}
.input {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.input::placeholder { color: var(--color-text-muted); }
.input:hover { border-color: var(--color-paper-400); }
.input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}
.input.error { border-color: var(--color-danger); }
.input.error:focus { box-shadow: 0 0 0 3px var(--color-danger-bg); }

.input-help { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.input-error { font-size: var(--font-size-sm); color: var(--color-danger); }

/* Phone input with country code */
.phone-input {
  display: flex;
  align-items: stretch;
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg-elevated);
  overflow: hidden;
  transition: border-color var(--duration-fast) var(--ease-out);
}
.phone-input:focus-within {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}
.phone-input__code {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  font-size: var(--font-size-base);
  color: var(--color-text-soft);
  background: var(--color-bg-soft);
  border-right: 1px solid var(--color-border);
  cursor: pointer;
  min-width: 100px;
}
.phone-input__code::after {
  content: '▾';
  margin-left: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.phone-input__number {
  flex: 1;
  border: none;
  outline: none;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  background: transparent;
}
.phone-input__number::placeholder { color: var(--color-text-muted); }

/* OTP input */
.otp-input {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
}
.otp-input__digit {
  width: 52px;
  height: 64px;
  text-align: center;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-family-mono);
  background: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}
.otp-input__digit:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
  transform: translateY(-1px);
}
.otp-input__digit.filled {
  border-color: var(--color-primary-500);
  background: var(--color-primary-50);
}

/* ---------- Card ---------- */
.card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-xs);
}
.card-soft { background: var(--color-bg-soft); border-color: transparent; }
.card-elevated { box-shadow: var(--shadow-md); }
.card-ember {
  background: linear-gradient(135deg, var(--color-accent-50), var(--color-bg-elevated));
  border-color: var(--color-accent-200);
  box-shadow: var(--shadow-ember);
}
.card-hearth {
  background: linear-gradient(135deg, var(--color-primary-50), var(--color-bg-elevated));
  border-color: var(--color-primary-200);
}

/* ---------- Modal / Sheet ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(28, 25, 19, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fadeIn var(--duration-normal) var(--ease-out);
}
.modal-sheet {
  width: 100%;
  max-width: var(--container-default);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  padding: var(--space-5) var(--space-5) calc(var(--space-6) + var(--safe-area-bottom));
  box-shadow: var(--shadow-2xl);
  animation: sheetUp var(--duration-slow) var(--ease-spring);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-sheet__handle {
  width: 40px;
  height: 4px;
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-4);
}

/* ---------- Tag / Badge ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-bg-soft);
  color: var(--color-text-soft);
}
.tag-primary { background: var(--color-primary-50); color: var(--color-primary-700); }
.tag-accent { background: var(--color-accent-50); color: var(--color-accent-700); }
.tag-success { background: var(--color-success-bg); color: var(--color-success); }
.tag-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.tag-crisis { background: var(--color-crisis-bg); color: var(--color-crisis-text); }

/* ---------- Avatar ---------- */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.avatar-lg { width: 64px; height: 64px; font-size: var(--font-size-lg); }
.avatar-xl { width: 96px; height: 96px; font-size: var(--font-size-2xl); }
.avatar-partner-a { background: var(--color-primary-100); color: var(--color-primary-700); }
.avatar-partner-b { background: var(--color-accent-100); color: var(--color-accent-700); }

/* ---------- Tab bar ---------- */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  display: flex;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
  padding-bottom: var(--safe-area-bottom);
  height: calc(var(--tab-bar-height) + var(--safe-area-bottom));
}
.tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-medium);
  transition: color var(--duration-fast) var(--ease-out);
}
.tab.active { color: var(--color-primary-500); }
.tab__icon { width: 24px; height: 24px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: calc(var(--tab-bar-height) + var(--space-5) + var(--safe-area-bottom));
  left: var(--space-5);
  right: var(--space-5);
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  font-size: var(--font-size-sm);
  animation: toastIn var(--duration-slow) var(--ease-spring);
}

/* ---------- Loading ---------- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-soft) 0%, var(--color-paper-200) 50%, var(--color-bg-soft) 100%);
  background-size: 200% 100%;
  border-radius: var(--radius-sm);
  animation: shimmer 1.5s infinite;
}

/* ---------- Privacy / safety ring ---------- */
.safety-ring {
  position: relative;
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-7);
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  line-height: var(--line-height-snug);
}
.safety-ring::before {
  content: '🔒';
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  font-size: var(--font-size-sm);
}

/* ---------- Divider ---------- */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-5) 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ---------- Progress ---------- */
.progress {
  display: block;
  width: 100%;
  height: 6px;
  background: var(--color-bg-soft);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary-400), var(--color-accent-400));
  border-radius: var(--radius-full);
  transition: width var(--duration-slow) var(--ease-out);
}

/* ---------- Streak ring ---------- */
.streak-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.streak-ring__svg { transform: rotate(-90deg); }
.streak-ring__count {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}
.streak-ring__count strong {
  font-size: var(--font-size-2xl);
  line-height: 1;
}
.streak-ring__count span {
  font-size: var(--font-size-2xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  margin-top: 2px;
}

/* ---------- Magic moment (reveal) ---------- */
.magic-moment {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6) var(--space-5);
  gap: var(--space-5);
}
.magic-moment__ember {
  width: 120px;
  height: 120px;
  position: relative;
}
.magic-moment__quote {
  font-family: var(--font-family-serif);
  font-size: var(--font-size-xl);
  font-style: italic;
  line-height: var(--line-height-snug);
  color: var(--color-text-soft);
  max-width: 320px;
}

/* ---------- Crisis takeover (cannot dismiss) ---------- */
.crisis-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-crisis);
  background: var(--color-crisis-bg);
  overflow-y: auto;
  padding: var(--space-5);
  padding-top: max(var(--space-5), env(safe-area-inset-top));
  padding-bottom: max(var(--space-5), env(safe-area-inset-bottom));
}
.crisis-screen__inner {
  max-width: var(--container-default);
  margin: 0 auto;
}
.crisis-screen__header {
  text-align: center;
  margin-bottom: var(--space-6);
}
.crisis-screen__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--color-crisis);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  box-shadow: 0 0 0 8px rgba(197, 138, 26, 0.15);
}
.crisis-screen__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-crisis-text);
  margin: 0 0 var(--space-2);
}
.crisis-screen__subtitle {
  font-size: var(--font-size-md);
  color: var(--color-crisis-text);
  opacity: 0.85;
}
.crisis-resource {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-3);
}
.crisis-resource__country {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-eyebrow, var(--font-size-xs));
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-caps);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.crisis-resource__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}
.crisis-resource__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  margin-bottom: var(--space-3);
  line-height: var(--line-height-relaxed);
}
.crisis-resource__phone {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-crisis);
  color: white;
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-spring);
}
.crisis-resource__phone:hover { transform: translateY(-1px); }
.crisis-screen__footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-crisis-text);
  opacity: 0.7;
}

/* ---------- Voice waveform ---------- */
.waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 64px;
}
.waveform__bar {
  width: 4px;
  background: var(--color-primary-400);
  border-radius: var(--radius-full);
  transition: height var(--duration-instant) var(--ease-out);
}

/* ---------- Couple-pair visual ---------- */
.couple-pair {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.couple-pair__heart {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-400);
  font-size: 14px;
}
.couple-pair__names {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ---------- Floating Ember mascot ---------- */
.ember-floater {
  position: fixed;
  bottom: calc(var(--tab-bar-height) + var(--space-5) + var(--safe-area-bottom));
  right: var(--space-5);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-overlay);
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-spring);
}
.ember-floater:active { transform: scale(0.92); }
.ember-floater__dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 10px;
  height: 10px;
  background: var(--color-accent-400);
  border-radius: 50%;
  border: 2px solid var(--color-bg-elevated);
}

/* ---------- Empty state ---------- */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-5);
}
.empty-state__icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.4;
}

/* ---------- Privacy notice ---------- */
.privacy-notice {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  line-height: var(--line-height-snug);
}

/* ---------- Settings list ---------- */
.settings-list { display: flex; flex-direction: column; gap: 1px; background: var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-elevated);
  text-align: left;
  min-height: 60px;
  width: 100%;
  transition: background var(--duration-fast) var(--ease-out);
}
.settings-item:hover { background: var(--color-bg-soft); }
.settings-item__label { display: flex; flex-direction: column; gap: 2px; }
.settings-item__title { font-size: var(--font-size-base); font-weight: var(--font-weight-medium); color: var(--color-text); }
.settings-item__desc { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.settings-item__chevron { color: var(--color-text-muted); }

/* ---------- Toggle ---------- */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle__slider {
  position: absolute;
  inset: 0;
  background: var(--color-paper-300);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}
.toggle__slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform var(--duration-fast) var(--ease-spring);
  box-shadow: var(--shadow-sm);
}
.toggle input:checked + .toggle__slider { background: var(--color-primary-500); }
.toggle input:checked + .toggle__slider::before { transform: translateX(20px); }

/* ---------- Language picker ---------- */
.lang-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  background: var(--color-bg-soft);
  color: var(--color-text-soft);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.lang-pill:hover { background: var(--color-paper-200); }
.lang-pill.active {
  background: var(--color-primary-500);
  color: var(--color-text-inverse);
  border-color: var(--color-primary-500);
}

/* ---------- Floating action button ---------- */
.fab {
  position: fixed;
  bottom: calc(var(--tab-bar-height) + var(--space-5) + var(--safe-area-bottom));
  right: var(--space-5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent-400), var(--color-accent-500));
  color: white;
  font-size: 28px;
  box-shadow: var(--shadow-ember);
  z-index: var(--z-overlay);
  transition: transform var(--duration-fast) var(--ease-spring);
}
.fab:active { transform: scale(0.92); }

/* ---------- Respond area ---------- */
.respond-card {
  background: var(--color-bg-elevated);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
  min-height: 120px;
  resize: vertical;
  width: 100%;
  font-family: inherit;
}
.respond-card:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}
.respond-card::placeholder { color: var(--color-text-muted); }

/* ---------- Partner response (locked / unlocked) ---------- */
.partner-response {
  position: relative;
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1.5px dashed var(--color-border-strong);
}
.partner-response.locked::after {
  content: '🔒';
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  opacity: 0.5;
}
.partner-response.unlocked {
  background: var(--color-bg-elevated);
  border-style: solid;
  border-color: var(--color-primary-200);
  text-align: left;
  align-items: flex-start;
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

/* ===========================================================================
   V3: MOOD ARC CHART
   =========================================================================== */
.mood-arc {
  margin: var(--space-4) var(--space-5);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.mood-arc__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}
.mood-arc__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
}
.mood-arc__legend {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.mood-arc__legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-400);
  box-shadow: 0 0 0 3px rgba(217, 104, 58, 0.15);
}
.mood-arc__svg { width: 100%; height: 100px; display: block; }
.mood-arc__line {
  fill: none;
  stroke: var(--color-accent-400);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: var(--path-length);
  stroke-dashoffset: var(--path-length);
  animation: moodDraw 1500ms var(--ease-out) forwards;
}
.mood-arc__area {
  fill: url(#moodGradient);
  opacity: 0;
  animation: moodFade 800ms 800ms var(--ease-out) forwards;
}
.mood-arc__point {
  fill: var(--color-surface);
  stroke: var(--color-accent-400);
  stroke-width: 2;
  opacity: 0;
  animation: moodPointIn 300ms var(--ease-spring) forwards;
}
.mood-arc__point--today {
  fill: var(--color-accent-400);
  stroke: var(--color-accent-500);
  stroke-width: 3;
}
.mood-arc__point-pulse {
  fill: var(--color-accent-400);
  opacity: 0;
  animation: moodPulse 2s 1.5s ease-in-out infinite;
}
.mood-arc__day {
  font-size: 9px;
  fill: var(--color-text-muted);
  text-anchor: middle;
  font-weight: var(--font-weight-medium);
}
.mood-arc__day--today { fill: var(--color-accent-500); font-weight: var(--font-weight-bold); }

@keyframes moodDraw { to { stroke-dashoffset: 0; } }
@keyframes moodFade { to { opacity: 1; } }
@keyframes moodPointIn {
  from { opacity: 0; transform: scale(0); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes moodPulse {
  0% { opacity: 0.5; r: 8; }
  50% { opacity: 0; r: 18; }
  100% { opacity: 0; r: 22; }
}

/* ===========================================================================
   V3: QUICK REPLIES
   =========================================================================== */
.quick-replies {
  margin-bottom: var(--space-3);
}
.quick-replies__label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  font-weight: var(--font-weight-medium);
}
.quick-replies__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.quick-reply-chip {
  padding: 8px 12px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background: var(--color-bg-elevated, var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: 16px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  max-width: 100%;
  line-height: 1.4;
}
.quick-reply-chip:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
  color: var(--color-primary-700);
  transform: translateY(-1px);
}
.quick-reply-chip:active {
  transform: scale(0.97);
}

/* ===========================================================================
   V3: PARTNER CARD REACTIONS
   =========================================================================== */
.partner-card__reactions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.reaction {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  background: var(--color-bg-elevated, var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: 22px;
  cursor: pointer;
  font-size: 18px;
  transition: all var(--duration-fast) var(--ease-spring);
  overflow: visible;
}
.reaction:hover {
  transform: scale(1.1);
  border-color: var(--color-accent-300);
  background: var(--color-bg);
}
.reaction:active {
  transform: scale(0.92);
}
.reaction-float {
  position: absolute;
  top: 50%;
  left: 50%;
  font-size: 28px;
  pointer-events: none;
  transform: translate(-50%, -50%);
  animation: reactionFloat 1.4s var(--ease-out) forwards;
  z-index: var(--z-toast);
}
@keyframes reactionFloat {
  0% { transform: translate(-50%, -50%) scale(0.5); opacity: 1; }
  50% { opacity: 1; }
  100% { transform: translate(calc(-50% + var(--rx, 0)), -80px) scale(1.5); opacity: 0; }
}

/* ===========================================================================
   V3: PULL TO REFRESH
   =========================================================================== */
.pull-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  opacity: 0;
  transform: translateY(-30px);
  transition: opacity var(--duration-fast) var(--ease-out);
  pointer-events: none;
}
.pull-indicator.is-refreshing { opacity: 1 !important; }
.pull-indicator__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg-elevated, var(--color-surface));
  border: 1px solid var(--color-border);
  color: var(--color-primary-500);
}
.pull-indicator.is-refreshing .pull-indicator__icon::after {
  content: '';
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-primary-500);
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===========================================================================
   V3: SUBMISSION CELEBRATION OVERLAY
   =========================================================================== */
.celebration-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  animation: fadeIn 200ms var(--ease-out);
  padding: var(--space-5);
}
.celebration-card {
  position: relative;
  background: var(--color-bg);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-6) var(--space-6);
  text-align: center;
  max-width: 360px;
  width: 100%;
  box-shadow: var(--shadow-2xl);
  animation: celebratePop 400ms var(--ease-spring);
}
.celebration-confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.celebration-confetti span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: confettiBurst 1s var(--ease-out) forwards;
}
@keyframes confettiBurst {
  0% { transform: translate(-50%, -50%) scale(0); opacity: 1; }
  60% { opacity: 1; }
  100% { transform: translate(calc(-50% + var(--cx, 0)), calc(-50% + var(--cy, 0))) scale(1.2); opacity: 0; }
}
.celebration-checkmark {
  display: inline-flex;
  margin-bottom: var(--space-4);
}
.celebration-checkmark__circle {
  stroke: var(--color-accent-400);
  stroke-width: 2;
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  animation: checkmarkCircle 600ms 200ms var(--ease-out) forwards;
}
.celebration-checkmark__check {
  stroke: var(--color-accent-400);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  animation: checkmarkCheck 400ms 600ms var(--ease-out) forwards;
}
@keyframes checkmarkCircle { to { stroke-dashoffset: 0; } }
@keyframes checkmarkCheck { to { stroke-dashoffset: 0; } }
.celebration-title {
  font-family: 'Source Serif Pro', serif;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
.celebration-body {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-5);
  line-height: 1.5;
}
@keyframes celebratePop {
  0% { transform: scale(0.7) translateY(20px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

/* ===========================================================================
   V3: ACHIEVEMENTS GRID
   =========================================================================== */
.achievements-page { min-height: 100vh; padding-bottom: var(--tab-bar-height); }
.achievements-header {
  padding: var(--space-6) var(--space-5) var(--space-4);
  text-align: center;
}
.achievements-header__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-3);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}
.achievements-header__back:hover {
  background: var(--color-bg-elevated, var(--color-surface));
  color: var(--color-text);
}
.achievements-header__title {
  font-family: 'Source Serif Pro', serif;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
.achievements-header__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-5);
  line-height: 1.5;
}
.achievements-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  margin: 0 var(--space-5) var(--space-5);
}
.achievements-progress__bar {
  width: 100%;
  max-width: 320px;
  height: 8px;
  background: var(--color-bg-elevated, var(--color-surface));
  border-radius: 4px;
  overflow: hidden;
}
.achievements-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent-400), var(--color-primary-400));
  border-radius: 4px;
  transition: width 1.2s var(--ease-out);
}
.achievements-progress__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
  padding: 0 var(--space-5);
}
.achievement {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--duration-normal) var(--ease-out);
}
.achievement--unlocked {
  background: linear-gradient(180deg, var(--color-bg), var(--color-primary-50));
  border-color: var(--color-primary-200);
}
.achievement--unlocked:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.achievement--locked {
  opacity: 0.55;
  filter: grayscale(0.4);
}
.achievement__icon {
  font-size: 36px;
  line-height: 1;
  margin-bottom: var(--space-1);
}
.achievement--unlocked .achievement__icon {
  animation: badgeBounce 2.4s ease-in-out infinite;
}
.achievement__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
  line-height: 1.3;
}
.achievement__desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.4;
}
.achievement__lock {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 14px;
  opacity: 0.6;
}
.achievement__progress {
  width: 100%;
  height: 4px;
  background: var(--color-bg-elevated, var(--color-surface));
  border-radius: 2px;
  overflow: hidden;
  margin-top: var(--space-2);
}
.achievement__progress-fill {
  height: 100%;
  background: var(--color-accent-400);
  border-radius: 2px;
  transition: width 1.2s var(--ease-out);
}
@keyframes badgeBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

/* ===========================================================================
   V3: HISTORY TIMELINE
   =========================================================================== */
.history-page { min-height: 100vh; padding-bottom: var(--tab-bar-height); }
.history-header {
  padding: var(--space-6) var(--space-5) var(--space-4);
  text-align: center;
}
.history-header__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-3);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}
.history-header__back:hover {
  background: var(--color-bg-elevated, var(--color-surface));
  color: var(--color-text);
}
.history-header__title {
  font-family: 'Source Serif Pro', serif;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
.history-header__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-5);
  line-height: 1.5;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}
.history-filters {
  display: flex;
  gap: var(--space-2);
  padding: 0 var(--space-5);
  overflow-x: auto;
  margin-bottom: var(--space-5);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.history-filters::-webkit-scrollbar { display: none; }
.history-filter {
  flex-shrink: 0;
  padding: 6px 14px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.history-filter:hover {
  border-color: var(--color-primary-300);
  color: var(--color-primary-700);
}
.history-filter.active {
  background: var(--color-primary-500);
  color: var(--color-text-inverse);
  border-color: var(--color-primary-500);
}
.history-timeline {
  position: relative;
  padding: 0 var(--space-5);
}
.history-timeline::before {
  content: '';
  position: absolute;
  left: calc(var(--space-5) + 14px);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.history-entry {
  position: relative;
  padding: var(--space-3) 0 var(--space-3) var(--space-8);
}
.history-entry__dot {
  position: absolute;
  left: calc(var(--space-5) + 8px);
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-primary-500);
  z-index: 1;
}
.history-entry__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.history-entry__card:hover {
  border-color: var(--color-primary-300);
  transform: translateX(2px);
  box-shadow: var(--shadow-sm);
}
.history-entry__date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-1);
  font-weight: var(--font-weight-medium);
  text-transform: capitalize;
}
.history-entry__category {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  color: var(--color-primary-700);
  background: var(--color-primary-50);
  padding: 2px 8px;
  border-radius: 8px;
  margin-bottom: var(--space-2);
  letter-spacing: 0.5px;
}
.history-entry__prompt {
  font-size: var(--font-size-sm);
  font-style: italic;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
  line-height: 1.5;
}
.history-entry__response {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin: 0 0 var(--space-3);
  line-height: 1.5;
}
.history-entry__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.history-entry__mood { color: var(--color-accent-500); font-weight: var(--font-weight-semibold); }

/* ===========================================================================
   V3: DRAFT INDICATOR
   =========================================================================== */
.draft-indicator {
  position: absolute;
  bottom: 8px;
  right: 8px;
  font-size: 11px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-500);
  background: var(--color-primary-50);
  padding: 2px 8px;
  border-radius: 10px;
  pointer-events: none;
  animation: fadeIn 200ms var(--ease-out);
}
.today-respond__textarea { position: relative; }

/* ===========================================================================
   V3: TOOLTIP TOUR
   =========================================================================== */
.tooltip-tour {
  position: fixed;
  bottom: calc(var(--tab-bar-height) + var(--space-4) + var(--safe-area-bottom));
  left: var(--space-4);
  right: var(--space-4);
  max-width: 360px;
  margin: 0 auto;
  background: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  z-index: var(--z-toast);
  animation: tooltipUp 400ms var(--ease-spring);
}
.tooltip-tour__text { flex: 1; }
.tooltip-tour__dismiss {
  background: transparent;
  border: 1px solid currentColor;
  color: inherit;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}
.tooltip-tour__dismiss:hover {
  background: rgba(255, 255, 255, 0.15);
}
@keyframes tooltipUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===========================================================================
   V3: ANIMATED TAB BAR INDICATOR
   =========================================================================== */
.tab {
  position: relative;
}
.tab::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--color-primary-500);
  border-radius: 0 0 2px 2px;
  transition: width var(--duration-normal) var(--ease-spring);
}
.tab.active::before {
  width: 32px;
}

/* ===========================================================================
   V3: VOICE PAGE WAVE / PLAYBACK (placeholder for next pass)
   =========================================================================== */
.voice-waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: 48px;
  margin: var(--space-3) 0;
}
.voice-waveform__bar {
  width: 3px;
  background: var(--color-primary-400);
  border-radius: 2px;
  animation: waveBar 1.2s ease-in-out infinite;
}
@keyframes waveBar {
  0%, 100% { height: 8px; }
  50% { height: 32px; }
}