/*
 * Physiodle Apple-style sandbox.
 *
 * Material is reserved for controls that float above content: the app header,
 * the mobile action dock, the sticky guess control and sheet headers. Clinical
 * content stays opaque so the visual treatment never competes with reading.
 */

:root {
  color-scheme: light;
  --ios-canvas: #dbeee8;
  --ios-surface: #ffffff;
  --ios-surface-2: #f7faf9;
  --ios-label: #17211f;
  --ios-secondary: #66736f;
  --ios-tertiary: #8d9895;
  --ios-separator: rgba(23, 33, 31, 0.11);
  --ios-accent: #128c7e;
  --ios-accent-pressed: #0d756a;
  --ios-glass: rgba(248, 252, 250, 0.78);
  --ios-glass-strong: rgba(255, 255, 255, 0.9);
  --ios-scrim: rgba(10, 18, 16, 0.38);
  --ios-danger: #d92d3a;
  --ios-success: #16815f;
  --ios-control-radius: 14px;
  --ios-card-radius: 18px;
  --ios-sheet-radius: 24px;
  --ios-elevation: 0 12px 32px rgba(23, 54, 47, 0.12);
}

html {
  background: var(--ios-canvas);
}

body {
  background: var(--ios-canvas);
  color: var(--ios-label);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before,
body::after {
  display: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

/* Floating application chrome */
.app-shell {
  width: min(calc(100% - 24px), 920px);
  margin: max(10px, env(safe-area-inset-top)) auto 0;
  padding: 8px;
  position: sticky;
  top: max(8px, env(safe-area-inset-top));
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--ios-glass);
  border: 1px solid rgba(255, 255, 255, 0.68);
  border-radius: var(--ios-card-radius);
  box-shadow: 0 8px 24px rgba(30, 69, 60, 0.08);
  -webkit-backdrop-filter: blur(24px) saturate(170%);
  backdrop-filter: blur(24px) saturate(170%);
}

.app-shell-header {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0;
  position: static;
  display: flex;
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.header-top {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.header-left {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  color: inherit;
  text-decoration: none;
}

.logo-icon-img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.55);
}

.brand-copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
}

.logo-text {
  color: var(--ios-label);
  font-size: 1.05rem;
  font-weight: 720;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.day-indicator {
  color: var(--ios-secondary);
  font-size: 0.68rem;
  font-weight: 500;
  line-height: 1.2;
}

.header-meta,
.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.primary-nav {
  position: static;
  flex: 0 0 auto;
}

.header-btn,
.streak-pill {
  min-height: 44px;
  border: 0;
  border-radius: 12px;
  padding: 0 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  color: var(--ios-secondary);
  font-size: 0.78rem;
  font-weight: 590;
  line-height: 1;
  cursor: pointer;
  transition: background-color 120ms ease-out, color 120ms ease-out, transform 120ms ease-out;
}

.header-btn:hover,
.header-btn:focus-visible,
.streak-pill:hover,
.streak-pill:focus-visible {
  background: rgba(18, 140, 126, 0.09);
  color: var(--ios-accent);
}

.header-btn:active,
.streak-pill:active {
  transform: scale(0.97);
}

.nav-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.streak-pill {
  color: #a45b0a;
  font-variant-numeric: tabular-nums;
}

.streak-flame {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.account-rank-badge {
  margin-left: auto;
  padding: 0.35rem 0.65rem;
  text-align: center;
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: 0.5rem;
}

.account-rank-label,
.account-panel-title {
  color: var(--ios-secondary);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.account-panel {
  padding: 0.85rem;
  margin-bottom: 1rem;
  background: var(--ios-surface-2);
  border-radius: 0.5rem;
}

.account-panel-title {
  margin-bottom: 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.account-profile-label {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--ios-label);
  font-size: 0.8rem;
}

@media (min-width: 641px) and (max-width: 900px) {
  .app-shell {
    flex-wrap: wrap;
  }

  .app-shell-header,
  .primary-nav {
    flex: 1 0 100%;
  }

  .primary-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-top: 4px;
    border-top: 1px solid var(--ios-separator);
  }
}

/* Main reading hierarchy */
.container {
  max-width: 720px;
  padding: 24px 16px 40px;
}

.puzzle-prompt {
  margin: 0 0 12px;
  padding: 0;
  background: transparent;
  border: 0;
  color: var(--ios-secondary);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.puzzle-prompt-alt {
  color: var(--ios-secondary);
}

.guess-section {
  top: calc(72px + env(safe-area-inset-top, 0px));
  margin: 0 0 16px;
  padding: 8px;
  background: var(--ios-glass-strong);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--ios-card-radius);
  box-shadow: 0 8px 24px rgba(30, 69, 60, 0.08);
  -webkit-backdrop-filter: blur(24px) saturate(170%);
  backdrop-filter: blur(24px) saturate(170%);
}

.guess-row {
  gap: 8px;
}

.guess-input,
.form-input,
.fb-textarea,
.reminder-row select {
  background: var(--ios-surface);
  color: var(--ios-label);
  border: 1px solid var(--ios-separator);
  border-radius: var(--ios-control-radius);
  box-shadow: inset 0 0 0 0.5px rgba(255, 255, 255, 0.42);
}

.guess-input {
  min-height: 48px;
  padding: 0 14px;
}

.guess-input::placeholder,
.form-input::placeholder,
.fb-textarea::placeholder {
  color: var(--ios-tertiary);
}

.guess-input:focus,
.form-input:focus,
.fb-textarea:focus,
.reminder-row select:focus {
  border-color: var(--ios-accent);
  box-shadow: 0 0 0 3px rgba(18, 140, 126, 0.13);
}

.btn {
  border-radius: var(--ios-control-radius);
  min-height: 44px;
  font-weight: 650;
  transition: background-color 120ms ease-out, color 120ms ease-out, transform 120ms ease-out;
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--ios-accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--ios-accent-pressed);
  box-shadow: none;
  transform: none;
}

.btn-secondary {
  background: var(--ios-surface-2);
  color: var(--ios-label);
  border: 1px solid var(--ios-separator);
}

.btn-ghost {
  color: var(--ios-accent);
  border-color: var(--ios-separator);
}

.btn-link,
.autocomplete-item strong {
  color: var(--ios-accent);
}

.card,
.card.clue-card.revealed {
  background: var(--ios-surface);
  border: 1px solid var(--ios-separator);
  border-radius: var(--ios-card-radius);
  box-shadow: none;
}

.card.clue-card {
  padding: 16px;
  margin-bottom: 10px;
}

.card.clue-card.blurred {
  background: var(--ios-surface-2);
  border-color: transparent;
}

.clue-label {
  margin-bottom: 6px;
  color: var(--ios-accent);
  font-size: 0.66rem;
  font-weight: 720;
  letter-spacing: 0.07em;
}

.clue-text {
  color: var(--ios-label);
  font-size: 0.96rem;
  line-height: 1.52;
}

.autocomplete-dropdown {
  top: calc(100% + 6px);
  background: var(--ios-surface);
  border: 1px solid var(--ios-separator);
  border-radius: var(--ios-control-radius);
  box-shadow: var(--ios-elevation);
  overflow: hidden auto;
}

.autocomplete-item {
  min-height: 44px;
  border-color: var(--ios-separator);
}

.autocomplete-item:hover,
.autocomplete-item.selected {
  background: rgba(18, 140, 126, 0.09);
  color: var(--ios-accent);
}

.answer-summary,
.account-stat-card,
.auth-card,
.feedback-form {
  background: var(--ios-surface);
  color: var(--ios-label);
  border-color: var(--ios-separator);
  border-radius: var(--ios-card-radius);
}

.answer-summary {
  background: #eff9f5;
}

.answer-summary.lost {
  background: #fff2f2;
}

.account-stat-value,
.account-perf-value,
.auth-title,
.modal-title,
.result-title,
.result-answer {
  color: var(--ios-label);
}

.account-stat-label,
.account-perf-label,
.auth-subtitle,
.form-hint,
.install-note,
.love-note,
.star-caption {
  color: var(--ios-secondary);
}

/* Sheets and overlays */
.modal-overlay,
.result-overlay {
  background: var(--ios-scrim);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.modal,
.result-area {
  background: var(--ios-surface);
  color: var(--ios-label);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--ios-sheet-radius);
  box-shadow: var(--ios-elevation);
}

.modal-header {
  padding: 18px 20px 14px;
  background: var(--ios-glass-strong);
  border-color: var(--ios-separator);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  backdrop-filter: blur(22px) saturate(160%);
}

.modal-body {
  padding: 20px;
}

.modal-close,
.result-close {
  min-width: 44px;
  min-height: 44px;
  border-radius: 50%;
  color: var(--ios-secondary);
  background: var(--ios-surface-2);
}

.modal-tabs {
  border-color: var(--ios-separator);
}

.modal-tab {
  color: var(--ios-secondary);
}

.modal-tab.active {
  color: var(--ios-accent);
  border-bottom-color: var(--ios-accent);
}

.result-explanation,
.answer-summary-explanation {
  color: var(--ios-label);
  border-color: var(--ios-separator);
}

.result-area {
  animation: ios-dialog-in 220ms cubic-bezier(0.23, 1, 0.32, 1);
}

@keyframes ios-dialog-in {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

/* Keep the sibling recommendation clear of the mobile action dock. */
.sibling-popout {
  border-color: var(--ios-separator);
  border-radius: var(--ios-card-radius);
  box-shadow: var(--ios-elevation);
}

.feedback-section {
  padding-bottom: 16px;
}

@media (max-width: 640px) {
  body {
    padding-bottom: calc(84px + env(safe-area-inset-bottom));
  }

  .app-shell-header {
    width: calc(100% - 16px);
    margin: max(8px, env(safe-area-inset-top)) auto 0;
    top: max(6px, env(safe-area-inset-top));
    padding: 6px;
    position: sticky;
    z-index: 100;
    display: flex;
    background: var(--ios-glass);
    border: 1px solid rgba(255, 255, 255, 0.68);
    border-radius: var(--ios-card-radius);
    box-shadow: 0 8px 24px rgba(30, 69, 60, 0.08);
    -webkit-backdrop-filter: blur(24px) saturate(170%);
    backdrop-filter: blur(24px) saturate(170%);
  }

  .app-shell {
    display: contents;
  }

  .logo-icon-img {
    width: 34px;
    height: 34px;
    border-radius: 9px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .day-indicator {
    display: none;
  }

  .header-meta {
    gap: 2px;
  }

  .header-meta .header-btn,
  .header-meta .streak-pill {
    min-width: 44px;
    min-height: 44px;
    padding: 0 10px;
  }

  .header-utility .nav-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .primary-nav {
    width: min(calc(100% - 24px), 360px);
    padding: 6px;
    position: fixed;
    left: 50%;
    bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 190;
    transform: translateX(-50%);
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px;
    background: var(--ios-glass-strong);
    border: 1px solid rgba(255, 255, 255, 0.68);
    border-radius: var(--ios-sheet-radius);
    box-shadow: var(--ios-elevation);
    -webkit-backdrop-filter: blur(26px) saturate(180%);
    backdrop-filter: blur(26px) saturate(180%);
  }

  .primary-nav .header-btn {
    min-width: 44px;
    min-height: 52px;
    padding: 4px 2px;
    flex-direction: column;
    gap: 3px;
    border-radius: var(--ios-card-radius);
    color: var(--ios-secondary);
    font-size: 0.64rem;
  }

  .primary-nav .nav-icon {
    width: 20px;
    height: 20px;
  }

  .container {
    padding: 18px 12px calc(32px + env(safe-area-inset-bottom));
  }

  .puzzle-prompt {
    margin-bottom: 10px;
    font-size: 0.7rem;
  }

  .guess-section {
    top: calc(70px + env(safe-area-inset-top, 0px));
    margin-bottom: 16px;
    padding: 7px;
  }

  .guess-input {
    min-height: 48px;
    padding: 0 12px;
  }

  #submitBtn {
    min-height: 48px;
    padding: 0 16px;
    font-size: 0.9rem;
  }

  .card.clue-card {
    padding: 16px;
    margin-bottom: 10px;
  }

  .clue-label {
    font-size: 0.66rem;
  }

  .clue-text {
    font-size: 0.96rem;
    line-height: 1.52;
  }

  .modal-overlay.show,
  .result-overlay.show {
    align-items: flex-end;
    justify-content: center;
    padding: max(8px, env(safe-area-inset-top)) 0 max(8px, env(safe-area-inset-bottom));
    overflow: hidden;
  }

  .modal,
  .result-area {
    width: 100%;
    max-width: none !important;
    max-height: calc(92vh - env(safe-area-inset-top));
    margin: 0;
    border-radius: var(--ios-sheet-radius) var(--ios-sheet-radius) 0 0;
    border-bottom: 0;
    overflow-y: auto;
    animation: ios-sheet-in 260ms cubic-bezier(0.23, 1, 0.32, 1);
  }

  .modal::before,
  .result-area::before {
    content: "";
    display: block;
    width: 36px;
    height: 5px;
    margin: 8px auto 0;
    border-radius: 99px;
    background: var(--ios-separator);
  }

  .modal-header {
    padding-top: 8px;
  }

  .result-area {
    padding: 8px 20px calc(22px + env(safe-area-inset-bottom));
  }

  #siblingPopout {
    bottom: calc(78px + env(safe-area-inset-bottom));
  }

  .sibling-popout-dismiss {
    width: 44px;
    height: 44px;
    top: -17px;
    right: -17px;
    background: transparent;
    border: 0;
    box-shadow: none;
    isolation: isolate;
  }

  .sibling-popout-dismiss::before {
    content: "";
    position: absolute;
    inset: 10px;
    z-index: -1;
    background: var(--ios-surface);
    border: 1px solid var(--ios-separator);
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  }

  .sibling-popout {
    max-width: min(280px, calc(100vw - 32px));
  }
}

@keyframes ios-sheet-in {
  from { transform: translateY(24px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .modal,
  .result-area {
    animation-name: none !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .app-shell-header,
  .app-shell,
  .primary-nav,
  .guess-section,
  .modal-header {
    background: var(--ios-surface);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .app-shell-header,
  .app-shell,
  .primary-nav,
  .guess-section,
  .modal-header {
    background: var(--ios-surface);
  }
}