/* Design system matching main site */
:root {
  --color-white: #ffffff;
  --color-woodsmoke: #0e0e10;
  --color-grey-mid: #6c6c6d;
  --color-grey-contrast: #333333;
  --color-grey-muted: #919191;
  --color-grey-border: #dbdbdb;
  --color-grey-faint: rgba(14, 14, 16, 0.44);
  --color-card-bg: #f9f9f9;
  --color-divider: rgba(0, 0, 0, 0.2);
  --color-accent: #d22c2c;
  --color-accent-muted: rgba(210, 44, 44, 0.5);

  --font-family-base: "Geist", sans-serif;
  --font-family-mono: "Geist Mono", monospace;
  --font-family-display: "Sentient", "Geist", sans-serif;

  --font-size-hero: 37.3px;
  --font-size-body: 17.4px;
  --font-size-body-sm: 17px;
  --font-size-body-xs: 13.3px;
  --font-size-link: 13px;

  --line-height-hero: 40px;
  --line-height-body: 28.8px;

  --spacing-xxs: 10px;
  --spacing-xs: 12px;
  --spacing-sm: 16px;
  --spacing-md: 19.4px;
  --spacing-lg: 20px;
  --spacing-xl: 40px;
}

::selection {
  background-color: rgba(210, 44, 44, 0.25);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  background: var(--color-white);
  color-scheme: light;
}

body {
  font-family: var(--font-family-base);
  color: var(--color-woodsmoke);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* Layout matching main site */
.background {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 22px 40px;
  background-color: var(--color-white);
}

.content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xl);
  width: min(100%, 580px);
}

/* Hero section */
.hero {
  display: flex;
  flex-direction: column;
  width: 100%;
  gap: 8px;
}

.hero__back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-grey-mid);
  text-decoration: none;
  font-size: var(--font-size-body-xs);
  margin-bottom: var(--spacing-xs);
  transition: color 0.2s ease;
  width: fit-content;
}

.hero__back-link:hover {
  text-decoration: underline;
  color: var(--color-grey-contrast);
}

.hero__back-link svg {
  width: 16px;
  height: 16px;
  transform: translateY(-1.5px);
}

.hero__heading {
  display: flex;
  flex-direction: column;
  margin: 5px 0 0;
  gap: 0;
  color: var(--color-woodsmoke);
  font-weight: 400;
  letter-spacing: -0.8px;
}

.hero__line {
  display: block;
  line-height: var(--line-height-hero);
  white-space: nowrap;
}

.hero__line--primary {
  font-size: var(--font-size-hero);
  font-family: var(--font-family-display);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.hero__description {
  margin-left: 0;
}

.hero__description p {
  margin: 0;
}

.hero__description-text {
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-grey-contrast);
}

.divider {
  width: 98px;
  height: 1px;
  background-color: var(--color-grey-border);
}

/* Form section */
.section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  width: 100%;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: var(--spacing-sm);
  align-items: end;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: var(--font-size-body-xs);
  font-weight: 400;
  line-height: 1.4;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-grey-mid);
}

.form-control {
  padding: 14px 16px;
  border: 1px solid var(--color-grey-border);
  border-radius: 12px;
  background-color: var(--color-white);
  color: var(--color-woodsmoke);
  font-family: var(--font-family-base);
  font-size: var(--font-size-body-sm);
  line-height: 1.4;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  appearance: none;
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(210, 44, 44, 0.1);
}

select.form-control {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236c6c6d' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* Week Navigation */
.week-navigation {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 12px 16px;
  background-color: var(--color-card-bg);
  border-radius: 16px;
  animation: fadeIn 0.3s ease;
}

.week-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-grey-border);
  border-radius: 8px;
  background: var(--color-white);
  color: var(--color-grey-contrast);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.week-nav-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: scale(1.05);
}

.week-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.week-nav-btn svg {
  width: 16px;
  height: 16px;
}

.week-display {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  text-align: center;
  gap: 8px;
  min-width: 0;
}

.week-picker {
  width: 100%;
  max-width: 100%;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--color-white);
  color: var(--color-grey-contrast);
  font-family: var(--font-family-base);
  font-size: var(--font-size-body-sm);
  text-align: center;
  cursor: pointer;
  outline: none;
  transition: all 0.2s ease;
  min-width: 0;
  display: block;
  -webkit-appearance: none;
}

.week-picker:hover {
  border-color: var(--color-grey-border);
}

.week-picker:focus {
  border-color: var(--color-accent);
}

.week-current-btn {
  padding: 6px 12px;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  background: transparent;
  color: var(--color-accent);
  font-family: var(--font-family-base);
  font-size: var(--font-size-link);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  align-self: center;
}

.week-current-btn:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

/* Results section */
.results {
  width: 100%;
  animation: fadeIn 0.3s ease;
}

.week-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.week-label {
  margin: 0;
  font-size: var(--font-size-body);
  font-weight: 400;
  color: var(--color-woodsmoke);
  display: flex;
  align-items: center;
  gap: 8px;
}

.week-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--color-card-bg);
  color: var(--color-grey-mid);
  font-size: var(--font-size-body-xs);
  font-weight: 400;
  white-space: nowrap;
}

.week-badge.holiday {
  background: rgba(210, 44, 44, 0.1);
  color: var(--color-accent);
}

.loading-indicator {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  display: none;
}

/* Course cards */
.courses-grid {
  display: grid;
  gap: var(--spacing-sm);
  grid-template-columns: 1fr;
}

@media (min-width: 480px) {
  .courses-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.course-card {
  background: var(--color-card-bg);
  border-radius: 20px;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course-card__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.course-card__header svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.course-card__title {
  margin: 0;
  font-size: var(--font-size-body);
  font-weight: 400;
  color: var(--color-woodsmoke);
}

.course-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.course-empty {
  color: var(--color-grey-muted);
  font-size: var(--font-size-body-sm);
}

.course-slot {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 14px;
  background: var(--color-white);
  border-radius: 12px;
  border: 1px solid var(--color-grey-border);
}

.slot-datetime {
  font-size: var(--font-size-body-sm);
  color: var(--color-grey-contrast);
  font-weight: 500;
}

.slot-details {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.slot-detail {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-body-xs);
  color: var(--color-grey-muted);
}

.slot-detail::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
}

.slot-detail:first-child::before {
  display: none;
}

/* Animations */
.fade-in {
  animation: none;
}

/* Mobile optimizations */
@media (max-width: 640px) {
  .background {
    padding: 60px 20px 40px;
  }

  .form-row {
    grid-template-columns: minmax(0, 1.3fr) minmax(80px, 0.9fr);
    gap: var(--spacing-xs);
  }

  .form-control {
    padding: 12px 14px;
  }

  .week-navigation {
    padding: 10px 12px;
  }

  .course-card {
    padding: 16px 20px;
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-white: #0e0e10;
    --color-woodsmoke: #f0f0f0;
    --color-grey-mid: #a0a0a0;
    --color-grey-contrast: #e0e0e0;
    --color-grey-muted: #808080;
    --color-grey-border: #2a2a2a;
    --color-card-bg: #1a1a1a;
    --color-accent: #cf4949;
  }

  body {
    background: var(--color-white);
    color: var(--color-woodsmoke);
  }

  .form-control {
    background: #1a1a1a;
    border-color: #2a2a2a;
    color: #f0f0f0;
  }

  select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  }
}