/* Cross-Cultural Annotation Platform - Main Styles */

/* Variables */
:root {
  --primary-color: #3454d1;
  --secondary-color: #1d2b64;
  --accent-color: #ff7a18;
  --success-color: #198754;
  --info-color: #1fb6ff;
  --warning-color: #facc15;
  --danger-color: #f43f5e;
  --light-bg: #f4f7fb;
  --lighter-bg: #ffffff;
  --dark-text: #0f172a;
  --muted-text: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 10px 25px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 20px 40px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 30px 60px rgba(15, 23, 42, 0.2);
  --transition: all 0.2s ease-in-out;
  --border-radius: 0.75rem;
  --font-family-sans-serif: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --gradient-primary: linear-gradient(120deg, #1d2b64 0%, #1d8fe1 45%, #68c2ff 100%);
  --gradient-accent: linear-gradient(120deg, #ff7a18 0%, #ffb347 100%);
}

/* Base Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-sans-serif);
  line-height: 1.6;
  color: var(--dark-text);
  background-color: var(--light-bg);
  background-image: radial-gradient(circle at top, rgba(104, 194, 255, 0.2), transparent 45%), radial-gradient(circle at 20% 20%, rgba(252, 211, 77, 0.25), transparent 40%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
}

.hero-section h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }
}

/* Navigation */
.navbar-brand {
  font-weight: 600;
  font-size: 1.25rem;
}

.navbar {
  background-image: var(--gradient-primary);
  box-shadow: var(--shadow-sm);
}

.navbar .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  font-weight: 500;
}

.navbar .nav-link:hover {
  color: #fff !important;
}

.navbar .dropdown-menu {
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.navbar .dropdown-item:active {
  background-color: var(--primary-color);
}

/* Cards */
.card {
  border: none;
  box-shadow: var(--shadow-sm);
  border-radius: var(--border-radius);
  transition: var(--transition);
  margin-bottom: 1rem;
  background: var(--lighter-bg);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  background-color: rgba(0, 0, 0, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
}

/* Buttons */
.btn {
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-weight: 500;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn:focus {
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

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

.btn-info {
  background-color: var(--info-color);
  border-color: var(--info-color);
}

.btn-outline-primary:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

/* Forms */
.form-control,
.form-select {
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

textarea.form-control {
  resize: vertical;
}

/* Badge Styling */
.badge {
  font-weight: 500;
  border-radius: 0.25rem;
}

.badge.bg-primary {
  background-color: var(--primary-color) !important;
}

.badge.bg-success {
  background-color: var(--success-color) !important;
}

.badge.bg-info {
  background-color: var(--info-color) !important;
}

.badge.bg-light {
  background-color: #f8f9fa !important;
}

/* Alerts */
.alert {
  border-radius: var(--border-radius);
  border: none;
}

.alert-success {
  background-color: #d1e7dd;
  color: #0f5132;
}

.alert-info {
  background-color: #cff4fc;
  color: #055160;
}

.alert.alert-guideline {
  background: rgba(52, 84, 209, 0.08);
  border-left: 4px solid var(--primary-color);
  color: var(--secondary-color);
}

.alert-warning {
  background-color: #fff3cd;
  color: #664d03;
}

.alert-danger {
  background-color: #f8d7da;
  color: #842029;
}

/* Modal Styling */
.modal-content {
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom: 1px solid var(--border-color);
}

.modal-footer {
  border-top: 1px solid var(--border-color);
}

/* Hero + Layout Enhancements */
.app-hero {
  background: var(--gradient-primary);
  border-radius: calc(var(--border-radius) * 1.5);
  padding: 3rem;
  color: #fff;
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.app-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 220px;
  height: 220px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.app-hero h1 {
  color: #fff;
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.app-hero p {
  color: rgba(255, 255, 255, 0.85);
}

.hero-actions .btn {
  min-width: 180px;
}

.stat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-weight: 500;
  margin-right: 0.5rem;
}

.guideline-card {
  border-radius: calc(var(--border-radius) * 1.1);
  background: #fff;
  box-shadow: var(--shadow-sm);
  padding: 1.75rem;
  border: 1px solid rgba(15, 23, 42, 0.05);
}

.guideline-card h5 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--secondary-color);
}

.guideline-card ul {
  margin-bottom: 0;
  padding-left: 1.2rem;
}

.task-card {
  border-radius: calc(var(--border-radius) * 1.1);
  padding: 1.5rem;
  background: var(--lighter-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.task-card .task-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.task-card .task-icon.judgment {
  background: var(--gradient-primary);
}

.task-card .task-icon.writing {
  background: var(--gradient-accent);
}

.task-card p {
  color: var(--muted-text);
}

.btn-glow {
  background: var(--gradient-accent);
  border: none;
  color: #fff;
  box-shadow: 0 12px 30px rgba(255, 122, 24, 0.35);
}

.btn-glow:hover {
  color: #fff;
  transform: translateY(-2px);
}

.badge.soft {
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
}

.writing-layout .card-header {
  border: none;
}

.completion-item {
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  background: #fff;
  padding: 1rem;
}

.completion-item .blockquote {
  margin-bottom: 0;
  color: var(--dark-text);
}

.model-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(15, 23, 42, 0.05);
  padding: 0.35rem 0.6rem;
}

.completion-item.selected-correct {
  border-color: var(--success-color);
  box-shadow: 0 0 0 2px rgba(25, 135, 84, 0.2);
}

.completion-item.selected-incorrect {
  border-color: var(--danger-color);
  box-shadow: 0 0 0 2px rgba(244, 63, 94, 0.2);
}

.section-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted-text);
}

.text-editor {
  border-radius: var(--border-radius);
  border: 1px solid rgba(15, 23, 42, 0.12);
}

.text-editor:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(52, 84, 209, 0.2);
}

.metadata-info {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.metadata-item {
  flex: 1;
  min-width: 200px;
}

.reference-text {
  background-color: #f8fbff;
  padding: 1rem;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
}

.char-count {
  font-size: 0.85rem;
  color: var(--muted-text);
  margin-top: 0.25rem;
}

.glass-panel {
  background: rgba(255, 255, 255, 0.8);
  border-radius: calc(var(--border-radius) * 1.1);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.6);
}

.selected-annotations {
  border-radius: var(--border-radius);
  border: 1px dashed rgba(52, 84, 209, 0.3);
  background: rgba(52, 84, 209, 0.04);
}

/* Judgment Task Specific Styles */
.completion-item {
  background: white;
  transition: var(--transition);
  cursor: pointer;
}

.completion-item:hover {
  border-color: var(--primary-color);
  box-shadow: 0 2px 8px rgba(13, 110, 253, 0.1);
}

.completion-item.selected-correct {
  background-color: #d1e7dd;
  border-color: var(--success-color);
}

.completion-item.selected-incorrect {
  background-color: #f8d7da;
  border-color: var(--danger-color);
}

.blockquote {
  margin: 0;
  padding: 1rem;
  background: #f8f9fa;
  border-left: 4px solid var(--primary-color);
  border-radius: 0 0.375rem 0.375rem 0;
}

.annotation-controls .btn-group {
  border-radius: 0.25rem;
  overflow: hidden;
}

.annotation-controls .btn-sm {
  font-size: 0.875rem;
  padding: 0.25rem 0.75rem;
}

.selected-annotations {
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin: 1rem 0;
}

/* Writing Task Specific Styles */
.text-editor {
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 1rem;
  line-height: 1.8;
  background: linear-gradient(white, #f8f9fa);
}

.char-count {
  font-size: 0.875rem;
  color: var(--muted-text);
  margin-top: 0.25rem;
}

.reference-text {
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  border-left: 4px solid var(--info-color);
  padding: 1.25rem;
  border-radius: 0.375rem 0.375rem 0.375rem 0;
  font-style: italic;
  margin-bottom: 1rem;
}

.metadata-info {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.metadata-item {
  flex: 1;
  min-width: 200px;
}

.metadata-item h6 {
  color: var(--muted-text);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Progress Display */
.progress-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
}

.progress-bar-bg {
  height: 8px;
  background: var(--light-bg);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #0d6efd, #0dcaf0);
  transition: width 0.3s ease;
}

/* Loading Spinner */
.spinner-border {
  border-width: 0.25em;
}

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
}

/* Tooltip Styling */
.tooltip-custom {
  position: relative;
  cursor: help;
}

.tooltip-custom:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--dark-text);
  color: white;
  padding: 0.5rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  white-space: nowrap;
  z-index: 1000;
  margin-bottom: 0.5rem;
}

/* Feature Cards on Index Page */
.feature-card {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.feature-card .card-text {
  flex-grow: 1;
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--light-bg);
}

.feature-icon i {
  margin: 0;
}

/* Language Badge Display */
.language-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.badge-language {
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
}

/* Footer */
footer {
  background-color: white !important;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-section h1 {
    font-size: 2rem;
  }

  .completion-item .btn-group {
    width: 100%;
    margin-top: 0.5rem;
  }

  .completion-item .btn-group .btn {
    flex: 1;
  }

  .annotation-controls {
    display: flex;
    justify-content: center;
  }

  .metadata-info {
    flex-direction: column;
    gap: 1rem;
  }

  .d-flex.gap-2 {
    flex-wrap: wrap;
  }

  .progress-display {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }
}

@media (max-width: 576px) {
  .hero-section {
    padding: 2rem 1rem;
  }

  .card {
    margin-bottom: 1rem;
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .btn-group .btn {
    border-radius: 0;
    margin-bottom: -1px;
  }

  .btn-group .btn:first-child {
    border-top-left-radius: 0.25rem;
    border-top-right-radius: 0.25rem;
  }

  .btn-group .btn:last-child {
    border-bottom-left-radius: 0.25rem;
    border-bottom-right-radius: 0.25rem;
    margin-bottom: 0;
  }
}

/* Print Styles */
@media print {
  nav, footer, .btn {
    display: none !important;
  }

  body {
    background: white !important;
  }

  .card {
    box-shadow: none !important;
    border: 1px solid #ddd !important;
  }
}

/* Accessibility Improvements */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  .card {
    border: 2px solid var(--dark-text);
  }

  .btn {
    border-width: 2px;
  }
}