/**
 * Backend Engineer Detective - Detective Noir Theme
 * Dark, atmospheric styling inspired by film noir aesthetics
 */

/* ========================================
   CSS Variables
   ======================================== */

:root {
  /* Primary colors */
  --color-bg-primary: #0d1117;
  --color-bg-secondary: #161b22;
  --color-bg-tertiary: #21262d;
  --color-bg-elevated: #1c2128;

  /* Accent colors */
  --color-accent-red: #e94560;
  --color-accent-gold: #f0a500;
  --color-accent-blue: #58a6ff;
  --color-accent-green: #3fb950;
  --color-accent-orange: #f78166;

  /* Text colors */
  --color-text-primary: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;

  /* Border colors */
  --color-border: #30363d;
  --color-border-muted: #21262d;

  /* Difficulty badge colors */
  --color-junior: #3fb950;
  --color-mid: #58a6ff;
  --color-senior: #f0a500;
  --color-principal: #e94560;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

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

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* ========================================
   Base Styles
   ======================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

#app {
  min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */

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

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-md);
}

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

a:hover {
  text-decoration: underline;
}

/* ========================================
   Lucide Icons
   ======================================== */

[data-lucide] {
  width: 1em;
  height: 1em;
  stroke-width: 2;
  vertical-align: -0.125em;
}

.header-icon {
  width: 1.25em;
  height: 1.25em;
  margin-right: var(--spacing-sm);
  vertical-align: -0.2em;
}

.section-icon {
  width: 1.1em;
  height: 1.1em;
  margin-right: var(--spacing-sm);
  vertical-align: -0.15em;
  opacity: 0.8;
}

.inline-icon {
  width: 0.9em;
  height: 0.9em;
  margin-right: 0.25em;
  vertical-align: -0.1em;
  opacity: 0.7;
}

.stat-icon {
  width: 1.25em;
  height: 1.25em;
  margin-bottom: var(--spacing-xs);
  opacity: 0.6;
}

.case-icon {
  width: 1.5em;
  height: 1.5em;
  color: var(--color-accent-gold);
}

.clue-icon {
  width: 1.2em;
  height: 1.2em;
  color: var(--color-accent-blue);
}

.clue-icon-small {
  width: 1em;
  height: 1em;
}

.insight-icon {
  width: 1.5em;
  height: 1.5em;
  color: var(--color-accent-gold);
  flex-shrink: 0;
}

.text-success {
  color: var(--color-accent-green);
}

.text-danger {
  color: var(--color-accent-red);
}

.text-warning {
  color: var(--color-accent-gold);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-primary:hover {
  background-color: #d63850;
  transform: translateY(-1px);
}

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

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

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-tertiary);
}

.btn-chat {
  background-color: var(--color-accent-gold);
  color: var(--color-bg-primary);
  font-weight: 600;
}

.btn-chat:hover {
  background-color: #dba000;
}

/* Button Loading State */
.btn.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.8;
}

.btn.btn-loading .btn-text {
  visibility: hidden;
}

.btn.btn-loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  top: 50%;
  left: 50%;
  margin-left: -9px;
  margin-top: -9px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.btn-back {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  padding: var(--spacing-sm);
}

.btn-back:hover {
  color: var(--color-text-primary);
}

/* ========================================
   Badges
   ======================================== */

.badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-junior {
  background-color: rgba(63, 185, 80, 0.2);
  color: var(--color-junior);
}

.badge-mid {
  background-color: rgba(88, 166, 255, 0.2);
  color: var(--color-mid);
}

.badge-senior {
  background-color: rgba(240, 165, 0, 0.2);
  color: var(--color-senior);
}

.badge-principal {
  background-color: rgba(233, 69, 96, 0.2);
  color: var(--color-principal);
}

.badge-category {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

/* ========================================
   Loading State
   ======================================== */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-lg);
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent-red);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-state p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* ========================================
   Error State
   ======================================== */

.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-md);
  text-align: center;
  padding: var(--spacing-xl);
}

.error-icon {
  font-size: 3rem;
}

/* ========================================
   Case List View
   ======================================== */

.case-list-header {
  position: relative;
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  max-width: 800px;
  margin: 0 auto;
}

.case-list-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-accent-red), var(--color-accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.case-list-header .subtitle {
  color: var(--color-text-secondary);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
}

.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-gold);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ========================================
   Filter Bar
   ======================================== */

.filter-bar {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.filter-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  min-width: 140px;
}

.filter-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.filter-select {
  padding: var(--spacing-sm) var(--spacing-md);
  padding-right: var(--spacing-xl);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  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='%238b949e' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

.filter-select:hover {
  border-color: var(--color-accent-gold);
}

.filter-select:focus {
  outline: none;
  border-color: var(--color-accent-gold);
  box-shadow: 0 0 0 2px rgba(240, 165, 0, 0.2);
}

.filter-search {
  flex: 1;
  min-width: 200px;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: 0.75rem;
  width: 1rem;
  height: 1rem;
  color: var(--color-text-muted);
  pointer-events: none;
}

.filter-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  padding-left: 2.25rem;
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.filter-input::placeholder {
  color: var(--color-text-muted);
}

.filter-input:hover {
  border-color: var(--color-accent-gold);
}

.filter-input:focus {
  outline: none;
  border-color: var(--color-accent-gold);
  box-shadow: 0 0 0 2px rgba(240, 165, 0, 0.2);
}

.filter-results {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  padding-left: var(--spacing-xs);
}

.filter-results strong {
  color: var(--color-accent-gold);
}

/* No Results State */
.no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  min-height: 300px;
}

.no-results-icon {
  width: 4rem;
  height: 4rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.no-results h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.no-results p {
  color: var(--color-text-muted);
  margin: 0;
}

@media (max-width: 768px) {
  .filter-controls {
    flex-direction: column;
  }

  .filter-group {
    width: 100%;
    min-width: 100%;
  }

  .filter-search {
    min-width: 100%;
  }
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

/* ========================================
   Case Card
   ======================================== */

.case-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.case-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-red);
  box-shadow: var(--shadow-lg);
}

.case-card.solved {
  border-color: var(--color-accent-green);
}

.case-card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.case-number {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.case-icon {
  font-size: 1.5rem;
}

.solved-stamp {
  position: absolute;
  top: 1rem;
  right: -2rem;
  background-color: var(--color-accent-green);
  color: var(--color-bg-primary);
  font-size: 0.625rem;
  font-weight: 700;
  padding: 0.25rem 2rem;
  transform: rotate(45deg);
  letter-spacing: 0.1em;
}

.case-title {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.case-subtitle {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.case-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.clue-count {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

/* ========================================
   Case View (Investigation)
   ======================================== */

.case-view {
  display: grid;
  grid-template-columns: 1fr 400px;
  min-height: 100vh;
}

@media (max-width: 1024px) {
  .case-view {
    grid-template-columns: 1fr;
  }

  .case-sidebar {
    order: -1;
    max-height: 50vh;
  }
}

.case-main {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 100vh;
}

.case-header {
  margin-bottom: var(--spacing-xl);
}

.case-title-section {
  margin: var(--spacing-md) 0;
}

.case-title-section h1 {
  margin-bottom: var(--spacing-xs);
}

.case-badges {
  display: flex;
  gap: var(--spacing-sm);
}

/* ========================================
   Crisis Section
   ======================================== */

.crisis-section {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.crisis-section h2 {
  margin-bottom: var(--spacing-md);
}

.crisis-description {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

.impact-box {
  background-color: rgba(233, 69, 96, 0.1);
  border: 1px solid rgba(233, 69, 96, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent-red);
}

.timeline h3 {
  margin-bottom: var(--spacing-md);
}

.timeline-list {
  list-style: none;
  border-left: 2px solid var(--color-border);
  padding-left: var(--spacing-lg);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-md);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-lg) - 5px);
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-border);
}

.timeline-item.timeline-warning::before {
  background-color: var(--color-accent-gold);
}

.timeline-item.timeline-critical::before {
  background-color: var(--color-accent-red);
}

.timeline-time {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-right: var(--spacing-sm);
}

.timeline-event {
  color: var(--color-text-primary);
}

/* ========================================
   Symptoms Section
   ======================================== */

.symptoms-section {
  margin-bottom: var(--spacing-lg);
}

.symptoms-section h2 {
  margin-bottom: var(--spacing-md);
}

.symptoms-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

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

.symptoms-column {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.symptoms-column h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
}

.symptoms-column.working h3 {
  color: var(--color-accent-green);
}

.symptoms-column.broken h3 {
  color: var(--color-accent-red);
}

.symptoms-column ul {
  list-style: none;
}

.symptoms-column li {
  padding: var(--spacing-xs) 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* ========================================
   Clues Section
   ======================================== */

.clues-section {
  margin-bottom: var(--spacing-lg);
}

.clues-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.clue-counter {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.clues-board {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.clue-card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.clue-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  border-bottom: 1px solid var(--color-border);
}

.clue-icon {
  font-size: 1.25rem;
}

.clue-title {
  flex: 1;
  font-weight: 600;
}

.clue-content {
  padding: var(--spacing-md);
  font-size: 0.875rem;
  line-height: 1.7;
}

.clue-content p {
  margin-bottom: var(--spacing-sm);
}

.clue-hint-container {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md);
}

.btn-show-hint {
  background: none;
  border: 1px dashed var(--color-accent-gold);
  color: var(--color-accent-gold);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.btn-show-hint:hover {
  background-color: rgba(240, 165, 0, 0.1);
  border-style: solid;
}

.clue-hint {
  padding-top: var(--spacing-sm);
  font-size: 0.875rem;
  font-style: italic;
  color: var(--color-accent-gold);
}

.clue-hint.hidden {
  display: none;
}

.clue-placeholder {
  text-align: center;
  padding: var(--spacing-xl);
  background-color: var(--color-bg-secondary);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.placeholder-text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
  margin-bottom: 0;
}

.all-clues-revealed {
  text-align: center;
  padding: var(--spacing-md);
  color: var(--color-text-muted);
}

/* Code blocks in clues */
.code-block {
  background-color: var(--color-bg-primary) !important;
  border-radius: var(--radius-md);
  padding: var(--spacing-md) !important;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.5;
  margin: var(--spacing-md) 0;
}

.inline-code {
  background-color: var(--color-bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* ========================================
   Diagnosis Section
   ======================================== */

.diagnosis-section {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.diagnosis-section h2 {
  margin-bottom: var(--spacing-md);
}

.diagnosis-instructions {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.diagnosis-form textarea {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  resize: vertical;
  margin-bottom: var(--spacing-md);
}

.diagnosis-form textarea:focus {
  outline: none;
  border-color: var(--color-accent-blue);
}

.diagnosis-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.diagnosis-feedback {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

.diagnosis-feedback.hidden {
  display: none;
}

.diagnosis-feedback.success {
  background-color: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.diagnosis-feedback.partial {
  background-color: rgba(240, 165, 0, 0.1);
  border: 1px solid rgba(240, 165, 0, 0.3);
}

.diagnosis-feedback.error {
  background-color: rgba(233, 69, 96, 0.1);
  border: 1px solid rgba(233, 69, 96, 0.3);
}

.feedback-message {
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.feedback-hint {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.matched-keywords {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-sm);
  margin-bottom: 0;
}

.attempt-counter {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: var(--spacing-md);
  margin-bottom: 0;
}

.diagnosis-section.solved,
.diagnosis-section.gave-up {
  text-align: center;
}

.solved-message,
.gave-up-message {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.final-score {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-accent-gold);
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   Two-Phase Diagnosis System
   ======================================== */

.diagnosis-phase {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-normal);
}

.diagnosis-phase.phase-active {
  border-color: var(--color-accent-blue);
  background-color: rgba(88, 166, 255, 0.05);
}

.diagnosis-phase.phase-complete {
  border-color: var(--color-accent-green);
  background-color: rgba(63, 185, 80, 0.05);
}

.diagnosis-phase.phase-locked {
  opacity: 0.6;
  background-color: var(--color-bg-tertiary);
}

.phase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.phase-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.phase-status {
  width: 1.25em;
  height: 1.25em;
}

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

.phase-answer {
  background-color: var(--color-bg-tertiary);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent-green);
}

.submitted-answer {
  margin: 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.phase-locked-message {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.diagnosis-actions-secondary {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: flex-end;
}

/* ========================================
   Score Panel
   ======================================== */

.score-panel {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.score-estimate {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.score-value {
  color: var(--color-accent-gold);
  font-family: var(--font-mono);
  font-size: 1.25rem;
}

.score-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.score-stats .stat {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
}

.score-stats .stat .inline-icon {
  opacity: 0.7;
}

@media (max-width: 768px) {
  .score-stats {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .score-stats .stat {
    width: 100%;
    justify-content: flex-start;
  }
}

/* ========================================
   Chat Panel (Sidebar)
   ======================================== */

.case-sidebar {
  background-color: var(--color-bg-secondary);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.chat-header h3 {
  margin-bottom: var(--spacing-xs);
}

.chat-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.chat-message {
  max-width: 90%;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  line-height: 1.5;
}

.chat-message.user {
  align-self: flex-end;
  background-color: var(--color-accent-blue);
  color: white;
}

.chat-message.assistant {
  align-self: flex-start;
  background-color: var(--color-bg-tertiary);
}

.chat-message .message-content p {
  margin-bottom: var(--spacing-sm);
}

.chat-message .message-content p:last-child {
  margin-bottom: 0;
}

.chat-message.streaming .streaming-content::after {
  content: '▋';
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.chat-input-area {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--spacing-sm);
}

.chat-input-area textarea {
  flex: 1;
  padding: var(--spacing-sm);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  resize: none;
}

.chat-input-area textarea:focus {
  outline: none;
  border-color: var(--color-accent-gold);
}

/* ========================================
   Solution View
   ======================================== */

.solution-view {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.solution-header {
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.solution-title-section h1 {
  color: var(--color-accent-green);
  margin-bottom: var(--spacing-xs);
}

.solution-title-section h2 {
  color: var(--color-text-primary);
}

.solved-badge {
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--color-accent-green);
  color: var(--color-bg-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
}

.solution-section {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.solution-section h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
}

.diagnosis-box {
  background-color: var(--color-bg-tertiary);
  border-left: 4px solid var(--color-accent-green);
  padding: var(--spacing-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.diagnosis-text {
  font-size: 1.125rem;
  font-weight: 500;
  margin: 0;
}

.explanation-content p {
  margin-bottom: var(--spacing-md);
}

.explanation-list {
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.explanation-list li {
  margin-bottom: var(--spacing-sm);
}

.code-example {
  margin-bottom: var(--spacing-lg);
}

.code-example-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.code-lang {
  background-color: var(--color-accent-blue);
  color: white;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
}

.code-description {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.prevention-list {
  list-style: none;
}

.prevention-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.prevention-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent-green);
  font-weight: bold;
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.insight-card {
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  gap: var(--spacing-sm);
}

.insight-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.insight-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.next-steps-content ul {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

.next-steps-content li {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

/* ========================================
   Scrollbar Styling
   ======================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ========================================
   Settings Menu
   ======================================== */

.settings-container {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
}

.btn-settings {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-settings:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.05);
}

.settings-dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  width: 220px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  z-index: 50;
}

.settings-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 16px;
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.15s ease;
  text-align: left;
}

.settings-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-primary);
}

.settings-dropdown-item .text-danger {
  color: var(--color-accent-red);
}

/* Reset Confirmation Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: var(--spacing-md);
}

.modal-dialog {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  width: 100%;
  max-width: 420px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.btn-modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  padding: 4px;
  cursor: pointer;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.btn-modal-close:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.modal-body {
  padding: 20px 24px;
}

.modal-body p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

.modal-footer {
  display: flex;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
}

.btn-cancel {
  flex: 1;
  padding: 10px 16px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-weight: 500;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-cancel:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
}

.btn-danger {
  flex: 1;
  padding: 10px 16px;
  background: var(--color-accent-red);
  border: none;
  color: white;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-danger:hover {
  background: #d63050;
}

/* ========================================
   Responsive Adjustments
   ======================================== */

@media (max-width: 768px) {
  .case-list-header h1 {
    font-size: 1.75rem;
  }

  .stats-bar {
    gap: var(--spacing-md);
  }

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

  .case-view {
    display: block;
  }

  .case-main {
    max-height: none;
  }

  .case-sidebar {
    position: relative;
    height: 50vh;
    border-left: none;
    border-top: 1px solid var(--color-border);
  }

  .solution-view {
    padding: var(--spacing-md);
  }

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