/* ============================================
   WHAT WOULD MARCUS AURELIUS DO?
   Design System & Styles
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colour Palette - Warm Earth Tones */
  --color-bg: #F5EDE0;
  --color-surface: #FDF8F0;
  --color-primary: #C75B39;
  --color-secondary: #5C6B4D;
  --color-text: #3D2B1F;
  --color-text-secondary: #7A6A5A;
  --color-border: #D4C4B0;
  --color-shadow: rgba(61, 43, 31, 0.15);

  /* Typography */
  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-system: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Sizing */
  --card-max-width: 340px;
  --card-padding: var(--space-xl);
  --border-radius: 12px;
  --border-radius-sm: 8px;

  /* Animation */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-serif);
  background-color: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Prevent pull-to-refresh on mobile */
body {
  overscroll-behavior-y: contain;
}

/* --- App Container --- */
#app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: 100vw;
  position: relative;
}

/* --- Header --- */
header {
  text-align: center;
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  flex-shrink: 0;
}

header h1 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.subtitle {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* --- Main View --- */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  padding-bottom: 80px;
  /* Space for nav */
}

/* --- Card Container with Swipe Hints --- */
.card-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 400px;
  position: relative;
}

/* --- Swipe Hints --- */
.swipe-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  opacity: 0.4;
  transition: opacity var(--transition-normal);
}

.swipe-hint--left .hint-icon {
  color: var(--color-text-secondary);
  font-size: 1.5rem;
}

.swipe-hint--right .hint-icon {
  color: var(--color-text-secondary);
  font-size: 1.5rem;
}

/* Pulse animation for hints */
@keyframes pulse {

  0%,
  100% {
    opacity: 0.4;
    transform: scale(1);
  }

  50% {
    opacity: 0.7;
    transform: scale(1.1);
  }
}

.swipe-hint--animate {
  animation: pulse 2s ease-in-out infinite;
}

/* --- Card --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  width: 100%;
  max-width: var(--card-max-width);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  box-shadow:
    0 4px 12px var(--color-shadow),
    0 1px 3px var(--color-shadow);
  cursor: grab;
  user-select: none;
  touch-action: pan-y;
  will-change: transform;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:active {
  cursor: grabbing;
}

.card__quote {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  quotes: none;
}

.card__source {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--color-text-secondary);
  display: block;
  text-align: right;
}

/* --- Card States --- */
.card--swiping {
  transition: none;
}

.card--dismissed {
  transition: transform 300ms ease-out, opacity 300ms ease-out;
}

.card--entering {
  animation: cardEnter 400ms var(--transition-spring) forwards;
}

@keyframes cardEnter {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Swipe direction indicators on card */
.card--swipe-left {
  box-shadow:
    -4px 4px 16px var(--color-shadow),
    0 0 0 3px var(--color-text-secondary);
}

.card--swipe-left {
  box-shadow:
    -4px 4px 16px var(--color-shadow),
    0 0 0 2px var(--color-text-secondary);
}

.card--swipe-right {
  box-shadow:
    4px 4px 16px var(--color-shadow),
    0 0 0 2px var(--color-text-secondary);
}

.card--swipe-down {
  box-shadow:
    0 4px 16px var(--color-shadow),
    0 0 0 3px var(--color-primary);
}

/* --- Instruction Text --- */
.instruction {
  font-family: var(--font-system);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-lg);
  opacity: 0.7;
  text-transform: uppercase;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Action Bar --- */
.action-bar {
  display: flex;
  justify-content: center;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
}

.action-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 12px var(--color-shadow);
  transition: all var(--transition-spring);
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--color-shadow);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.action-btn:active {
  transform: scale(0.95);
}

/* Ensure default state is properly set when not active */
.action-btn:not(.action-btn--active) {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.action-btn--active {
  background: var(--color-primary) !important;
  color: var(--color-surface) !important;
  border-color: var(--color-primary) !important;
}

/* Ensure active state overrides :active pseudo-class on iOS */
.action-btn--active:active {
  background: var(--color-primary) !important;
  color: var(--color-surface) !important;
  border-color: var(--color-primary) !important;
}

.action-btn--active:hover {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* --- Bottom Navigation --- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md);
  padding-bottom: max(var(--space-md), env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--color-bg) 60%, transparent);
  pointer-events: none;
}

.nav-tab {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-family: var(--font-system);
  font-size: 0.875rem;
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px var(--color-shadow);
}

.nav-tab:hover,
.nav-tab:focus-visible {
  background: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
  outline: none;
}

.nav-tab:focus-visible {
  box-shadow: 0 0 0 3px rgba(199, 91, 57, 0.3);
}

.nav-icon {
  font-size: 1rem;
}

/* --- Favourites View --- */
.favourites-view {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.favourites-view[hidden] {
  display: none;
}

.favourites-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.favourites-header h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.close-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.close-btn:hover,
.close-btn:focus-visible {
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
}

/* --- Favourites List --- */
.favourites-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.favourite-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-lg);
  cursor: grab;
  user-select: none;
  touch-action: pan-y;
  transition: box-shadow var(--transition-normal);
}

.favourite-card:active {
  cursor: grabbing;
}

.favourite-card--swiping {
  transition: none;
}

.favourite-card--removing {
  transition: transform 300ms ease-out, opacity 300ms ease-out;
  transform: translateX(-100%);
  opacity: 0;
}

.favourite-card__quote {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.5;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.favourite-card__source {
  font-family: var(--font-serif);
  font-size: 0.8rem;
  font-style: italic;
  color: var(--color-text-secondary);
}

.favourite-card__hint {
  font-family: var(--font-system);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  opacity: 0.6;
  margin-top: var(--space-sm);
  text-align: right;
}

/* --- Empty State --- */
.empty-message {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.empty-message[hidden] {
  display: none;
}

/* --- About View --- */
.about-view {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.about-view[hidden] {
  display: none;
}

.about-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.about-header h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.about-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-xl) var(--space-md);
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

.about-content h1 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.about-content h2 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.about-content h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.about-content p {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.about-content code {
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  background: var(--color-surface);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  border: 1px solid var(--color-border);
}

.about-content .error-message {
  color: var(--color-text-secondary);
  font-style: italic;
  text-align: center;
  padding: var(--space-xl);
}

/* --- Utility --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Media Queries --- */

/* Mobile optimization - align card to top on small screens */
@media (max-width: 479px) {
  main {
    justify-content: flex-start;
    padding-top: var(--space-sm);
    padding-bottom: 60px;
  }

  header {
    padding: var(--space-md) var(--space-md) var(--space-sm);
  }

  .card {
    padding: var(--space-md);
  }

  .favourites-list {
    padding: var(--space-sm);
  }

  .about-content {
    padding: var(--space-md) var(--space-md);
  }
}

@media (min-width: 480px) {
  header h1 {
    font-size: 2rem;
  }

  .card__quote {
    font-size: 1.35rem;
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}