/* CourseSnag - Minimalist Styles */

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-border: #e0e0e0;
  --color-accent: #b31b1b; /* Cornell red */
  --color-accent-hover: #8b1515;
  --color-open: #2e7d32;
  --color-closed: #c62828;
  --color-waitlist: #ef6c00;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  font-size: 14px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-accent);
  margin: 0;
}

.logo-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.roster-display {
  font-weight: 500;
  color: var(--color-text);
  padding: 0.5rem 0.75rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.timestamp {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Buttons */
.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s, opacity 0.15s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
}

.btn-secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-bg);
}

.btn-small {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

/* Form Elements */
input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
}

input:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Main Layout */
.main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  flex: 1;
}

@media (max-width: 768px) {
  .main {
    grid-template-columns: 1fr;
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo-section {
    flex-direction: column;
    gap: 0.25rem;
    align-items: flex-start;
  }

  .logo {
    font-size: 1.3rem;
  }

  .logo-subtitle {
    font-size: 0.75rem;
  }

  .header-controls {
    width: 100%;
    justify-content: space-between;
  }

  .panel {
    padding: 1rem;
  }

  .results-list,
  .tracked-list {
    max-height: 400px;
  }

  .section-row {
    grid-template-columns: 35px 40px 60px 1fr;
    gap: 0.35rem;
    padding: 0.4rem;
  }

  .badge-component {
    width: 34px;
    font-size: 0.65rem;
  }

  .badge-status {
    width: 55px;
    font-size: 0.65rem;
  }

  .btn-small {
    padding: 0.2rem 0.4rem;
    font-size: 0.7rem;
  }

  .tracked-item {
    padding: 0.6rem;
  }

  .tracked-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
  }
}

/* Panels */
.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.panel h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Search Controls */
.search-controls {
  margin-bottom: 1rem;
}

/* Status Messages */
.status-message {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.status-message.error {
  color: var(--color-closed);
}

.status-message.loading {
  color: var(--color-accent);
}

/* Empty State */
.empty-state {
  color: var(--color-text-muted);
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.875rem;
}

/* Error State */
.error-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--color-closed);
  background: #ffebee;
  border-radius: var(--radius);
  margin: 0.5rem 0;
}

.error-state p {
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.error-state .btn {
  margin-top: 0.5rem;
}

/* Results List */
.results-list {
  max-height: 600px;
  overflow-y: auto;
}

.results-list.is-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 220px;
}

/* Course Card - Collapsible */
.course-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.course-header {
  padding: 0.75rem;
  background: var(--color-bg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: background 0.1s;
}

.course-header:hover {
  background: #f0f0f0;
}

.course-header-info {
  flex: 1;
}

.course-title {
  font-weight: 600;
  font-size: 0.9rem;
}

.course-code {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.course-toggle {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  transition: transform 0.2s;
}

.course-card.expanded .course-toggle {
  transform: rotate(180deg);
}

.sections-list {
  padding: 0.5rem;
  display: none;
  border-top: 1px solid var(--color-border);
}

.course-card.expanded .sections-list {
  display: block;
}

/* Section Row - Fixed Alignment */
.section-row {
  display: grid;
  grid-template-columns: 40px 45px 70px 1fr;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: var(--radius);
  transition: background 0.1s;
}

.section-row:hover {
  background: var(--color-bg);
}

.section-number {
  font-weight: 500;
  font-size: 0.85rem;
}

.section-actions {
  display: flex;
  justify-content: flex-end;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  text-align: center;
}

.badge-component {
  background: #e3f2fd;
  color: #1565c0;
  width: 38px;
}

.badge-status {
  width: 64px;
}

.badge-open {
  background: #e8f5e9;
  color: var(--color-open);
}

.badge-closed {
  background: #ffebee;
  color: var(--color-closed);
}

.badge-waitlist {
  background: #fff3e0;
  color: var(--color-waitlist);
}

/* Tracked Header */
.tracked-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 1rem;
}

.tracked-header h2 {
  margin-bottom: 0;
}

.status-indicator {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  min-height: 1.2em;
  text-align: right;
}

.status-indicator.loading {
  color: var(--color-accent);
}

.status-indicator.error {
  color: var(--color-closed);
}

/* Tracked List */
.tracked-list {
  max-height: 600px;
  overflow-y: auto;
  position: relative;
}

.tracked-panel {
  display: flex;
  flex-direction: column;
}

.tracked-list {
  flex: 1;
}

.tracked-footer {
  margin-top: auto;
}

.tracked-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.5rem;
  background: var(--color-surface);
  position: relative;
}

.tracked-info {
  flex: 1;
}

.tracked-course {
  font-weight: 600;
  font-size: 0.9rem;
}

.tracked-section {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.tracked-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.tracked-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-remove {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 1rem;
  line-height: 1;
}

.btn-remove:hover {
  color: var(--color-closed);
}

/* Footer */
.footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 0.5rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Settings Section */
.settings-section {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.settings-section h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.settings-group {
  margin-bottom: 1rem;
}

.settings-group:last-child {
  margin-bottom: 0;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0;
  gap: 0.75rem;
}

.settings-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.segmented {
  --segment-count: 4;
  --segment-index: 0;
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--segment-count), 1fr);
  gap: 0;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 3px;
  width: 100%;
}

.segment-indicator {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 3px;
  width: calc(100% / var(--segment-count));
  background: var(--color-surface);
  border-radius: calc(var(--radius) - 3px);
  box-shadow: var(--shadow);
  transform: translateX(calc(100% * var(--segment-index)));
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.segment-btn {
  position: relative;
  z-index: 1;
  border: none;
  background: transparent;
  padding: 0.4rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: calc(var(--radius) - 3px);
  transition: color 0.2s ease;
  white-space: nowrap;
}

.segment-btn.is-active {
  color: var(--color-text);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
  flex: 1;
}

.toggle-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}

.notify-status {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.notify-status.granted {
  color: var(--color-open);
}

.notify-status.denied {
  color: var(--color-closed);
}

/* Alert Banner */
.alert-banner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.75rem;
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  z-index: 10;
  animation: pulse 1s ease-in-out infinite;
}

.alert-banner.hidden {
  display: none;
}

#alert-message {
  font-weight: 500;
  font-size: 0.9rem;
  text-align: center;
}

.alert-actions {
  display: flex;
  gap: 0.4rem;
  justify-content: center;
}

.alert-banner .btn {
  background: white;
  color: var(--color-accent);
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
}

.alert-banner .btn:hover {
  background: #f0f0f0;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}