/* Stylesheet for 90-Day AI Curriculum Platform */
:root {
  --bg-primary: #0b1118;
  --bg-secondary: #111b26;
  --bg-tertiary: #172535;
  --surface-raised: #142230;
  --text-main: #e7edf3;
  --text-muted: #9cafbf;
  --text-soft: #c6d2dc;
  --accent-cyan: #67d5d1;
  --accent-purple: #b7a6f6;
  --accent-emerald: #72d6a1;
  --accent-amber: #f2c572;
  --accent-rose: #ef8f9c;
  --border-color: #2a3b4b;
  --code-bg: #091017;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Noto Sans JP", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --container-max: 960px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.site-navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand span {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-legacy-roadmap {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  color: var(--text-soft);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.nav-legacy-roadmap:hover {
  background: var(--surface-raised);
  border-color: var(--accent-amber);
  color: var(--text-main);
  text-decoration: none;
}

.nav-calendar-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  color: var(--text-soft);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.nav-calendar-link:hover {
  background: var(--surface-raised);
  border-color: var(--accent-cyan);
  color: var(--text-main);
  text-decoration: none;
}

.lang-switcher {
  display: inline-flex;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.lang-link {
  padding: 4px 10px;
  font-size: 0.82rem;
  border-radius: 4px;
  color: var(--text-muted);
  text-decoration: none;
}
.lang-link:hover {
  color: var(--text-main);
  text-decoration: none;
}
.lang-link.active {
  background: var(--accent-cyan);
  color: #0b1118;
  font-weight: 600;
}

.main-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 24px 20px 80px;
}

.day-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
  margin-bottom: 32px;
}

.day-meta-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}
.badge-category {
  background: #14333a;
  color: var(--accent-cyan);
  border: 1px solid #234c56;
}
.badge-time {
  background: #332711;
  color: var(--accent-amber);
  border: 1px solid #55411c;
}
.badge-policy {
  background: #1d1b38;
  color: var(--accent-purple);
  border: 1px solid #3c386b;
}

.day-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 8px 0 12px;
  letter-spacing: -0.02em;
}

.day-subtitle {
  color: var(--text-soft);
  font-size: 1.1rem;
  margin: 0 0 16px;
  max-width: 800px;
}

.activity-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 32px;
  transition: border-color 0.2s ease;
}
.activity-card:focus-within {
  border-color: var(--accent-cyan);
}

.activity-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.activity-header h2 {
  font-size: 1.4rem;
  margin: 0;
  color: var(--text-main);
}

.activity-section {
  margin-bottom: 20px;
}
.activity-section h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
  margin: 0 0 8px;
}

.activity-section p, .activity-section li {
  color: var(--text-soft);
  margin: 0 0 8px;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--accent-emerald);
  margin: 12px 0;
  max-width: 100%;
}
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}
pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.exercise-container {
  background: var(--surface-raised);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-top: 20px;
}

.exercise-container h3 {
  margin-top: 0;
  color: var(--accent-amber);
}

.exercise-prompt {
  margin-bottom: 16px;
}

.exercise-draft-input {
  width: 100%;
  min-height: 110px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  padding: 12px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  resize: vertical;
  margin-bottom: 14px;
}
.exercise-draft-input:focus {
  outline: none;
  border-color: var(--accent-amber);
}

.exercise-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.btn-secondary {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}
.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-cyan);
}

.exercise-hint, .exercise-answer {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 16px;
  margin-top: 12px;
}
.exercise-hint {
  border-left: 4px solid var(--accent-amber);
}
.exercise-answer {
  border-left: 4px solid var(--accent-emerald);
}

.mastery-criterion {
  background: #172b22;
  border: 1px solid #2d5543;
  border-left: 4px solid var(--accent-emerald);
  padding: 16px;
  border-radius: 6px;
  margin-top: 20px;
  color: var(--text-main);
  font-size: 0.95rem;
}

.skill-modules-section {
  margin-top: 32px;
}

.skill-module-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.skill-module-title {
  font-size: 1.15rem;
  margin: 0 0 12px;
  color: var(--text-main);
}

.skill-module-objective {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.skill-module-instructions {
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.optional-media-card {
  background: #1a1622;
  border: 1px solid #3c3252;
  border-radius: 8px;
  padding: 16px;
  margin-top: 20px;
}
.optional-media-card h4 {
  margin: 0 0 8px;
  color: var(--accent-purple);
  font-size: 0.95rem;
}
.media-fallback-notice {
  font-size: 0.88rem;
  color: var(--accent-rose);
  margin: 0;
}

/* Source Resource Cards & Rights Gate UI */
.source-resources-container {
  margin-top: 32px;
  border-top: 1px dashed var(--border-color);
  padding-top: 24px;
}

.source-resource-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-top: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.source-card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.source-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.badge-reuse {
  background: rgba(103, 213, 209, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(103, 213, 209, 0.3);
}

.badge-license {
  background: rgba(114, 214, 161, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(114, 214, 161, 0.3);
}

.badge-restriction {
  background: rgba(242, 197, 114, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(242, 197, 114, 0.3);
}

.badge-candidate-status {
  background: rgba(183, 166, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(183, 166, 246, 0.3);
  font-size: 0.75rem;
}

.source-title {
  margin: 0 0 8px;
  color: var(--text-main);
  font-size: 1.15rem;
  line-height: 1.4;
}

.source-meta-line {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
  word-break: break-word;
}

.source-original-url {
  font-weight: 500;
  color: var(--accent-cyan);
}

.source-card-body {
  font-size: 0.92rem;
  color: var(--text-soft);
}

.source-detail-row {
  margin: 8px 0;
  line-height: 1.5;
  word-break: break-word;
}

.source-detail-block {
  margin: 14px 0;
}

.source-detail-block p {
  margin: 4px 0 0;
  color: var(--text-soft);
}

.source-fallback-box {
  background: rgba(239, 143, 156, 0.08);
  border: 1px solid rgba(239, 143, 156, 0.25);
  border-radius: 6px;
  padding: 12px 14px;
  margin: 16px 0;
}

.source-fallback-box strong {
  color: var(--accent-rose);
}

.source-fallback-notice {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.compared-candidates-details {
  margin-top: 18px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
}

.compared-candidates-summary {
  cursor: pointer;
  color: var(--accent-purple);
  font-size: 0.95rem;
  user-select: none;
}

.compared-candidates-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.compared-candidate-item {
  border-left: 2px solid var(--border-color);
  padding-left: 12px;
}

.candidate-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.candidate-link {
  font-weight: 600;
  color: var(--accent-cyan);
  word-break: break-word;
}

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

.candidate-rationale {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-soft);
}

.site-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

/* Auth Navbar & Profile Elements */
.auth-buttons {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-sign-in {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-raised);
  color: var(--accent-cyan);
  border: 1px solid var(--border-color);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.btn-sign-in:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-cyan);
  text-decoration: none;
}
.btn-sign-in-google:hover {
  border-color: var(--accent-amber);
}
.btn-sign-in-github:hover {
  border-color: var(--accent-purple);
}

.btn-link-identity {
  display: inline-flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  color: var(--text-soft);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  transition: all 0.2s ease;
}
.btn-link-identity:hover {
  border-color: var(--accent-cyan);
  color: var(--text-main);
  text-decoration: none;
}

.user-profile {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  flex-wrap: wrap;
}

.user-name {
  font-weight: 600;
  color: var(--accent-cyan);
}

.user-identities {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.badge-identity {
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: capitalize;
}
.badge-google {
  background: rgba(242, 197, 114, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(242, 197, 114, 0.3);
}
.badge-github {
  background: rgba(183, 166, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(183, 166, 246, 0.3);
}

.logout-form {
  display: inline;
  margin: 0;
}

.btn-logout {
  border: 0;
  padding: 0;
  background: transparent;
  font-family: inherit;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-decoration: underline;
  cursor: pointer;
}
.btn-logout:hover {
  color: var(--accent-rose);
}

.auth-alert-box {
  margin: 16px 0;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.92rem;
  line-height: 1.5;
  display: flex;
  align-items: center;
  gap: 10px;
}
.auth-alert-box[hidden] {
  display: none !important;
}
.auth-alert-error {
  background: rgba(239, 143, 156, 0.12);
  border: 1px solid var(--accent-rose);
  color: #ffb4be;
}
.auth-alert-success {
  background: rgba(114, 214, 161, 0.12);
  border: 1px solid var(--accent-emerald);
  color: #a2f2c8;
}

/* Exercise Progress Controls */
.exercise-progress-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
}

.completion-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-soft);
  cursor: pointer;
  user-select: none;
}

.activity-completion-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--accent-emerald);
}

.btn-save-progress {
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}

.save-status-indicator {
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.save-status-indicator.status-saved {
  color: var(--accent-emerald);
}

.save-status-indicator.status-saving {
  color: var(--accent-amber);
}

.save-status-indicator.status-error {
  color: var(--accent-rose);
}

.save-status-indicator.status-offline {
  color: var(--text-muted);
}

/* Quiz Container & Mastery Evidence Styles */
.quiz-container {
  margin-top: 24px;
  padding: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.assistance-mode-fieldset {
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px 16px;
  margin-bottom: 20px;
  background: var(--bg-tertiary);
}

.assistance-mode-fieldset legend {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  padding: 0 6px;
}

.assistance-mode-fieldset .radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-main);
}

.mode-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  margin-bottom: 0;
}

.quiz-questions-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 20px;
}

.quiz-question-card {
  padding: 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.quiz-question-header {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.question-number {
  font-weight: 700;
  color: var(--accent-cyan);
  font-size: 1.05rem;
}

.question-prompt {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-main);
}

.quiz-options-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-left: 24px;
}

.quiz-option-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.quiz-option-label:hover {
  border-color: var(--accent-cyan);
  background: var(--surface-raised, #242936);
}

.quiz-option-input {
  margin-top: 3px;
  cursor: pointer;
}

.option-key {
  font-weight: 600;
  color: var(--accent-amber);
}

.option-text {
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text-soft);
}

.question-hint-wrap {
  margin-top: 10px;
  margin-left: 24px;
}

.btn-toggle-q-hint {
  padding: 4px 10px;
  font-size: 0.8rem;
  cursor: pointer;
}

.question-hint {
  margin-top: 8px;
  padding: 10px;
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent-amber);
  border-radius: 4px;
  font-size: 0.88rem;
  line-height: 1.5;
}

.question-feedback {
  margin-top: 12px;
  margin-left: 24px;
  padding: 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.question-feedback.feedback-correct {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--accent-emerald);
}

.question-feedback.feedback-incorrect {
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid var(--accent-rose);
}

.feedback-status-msg .feedback-badge {
  font-weight: 700;
}

.feedback-correct .feedback-badge {
  color: var(--accent-emerald);
}

.feedback-incorrect .feedback-badge {
  color: var(--accent-rose);
}

.feedback-expected {
  color: var(--accent-amber);
  font-size: 0.85rem;
  margin-left: 8px;
}

.question-explanation {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
  font-size: 0.88rem;
  color: var(--text-soft);
}

.quiz-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn-submit-quiz {
  background: var(--accent-cyan);
  color: #0b0f19;
  border: none;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 6px;
  cursor: pointer;
}

.btn-submit-quiz:hover {
  filter: brightness(1.1);
}

.btn-retry-quiz {
  padding: 8px 16px;
  cursor: pointer;
}

.quiz-submit-status {
  font-size: 0.88rem;
}

.quiz-submit-status.status-saving {
  color: var(--accent-amber);
}

.quiz-submit-status.status-error {
  color: var(--accent-rose);
}

.quiz-results-banner {
  margin-top: 18px;
  padding: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.quiz-score-badge {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.quiz-feedback-text {
  font-size: 1.1rem;
  font-weight: 600;
}

.quiz-feedback-text.passed {
  color: var(--accent-emerald);
}

.quiz-feedback-text.failed {
  color: var(--accent-rose);
}

.mastery-evidence-panel {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.mastery-evidence-panel h4 {
  margin: 0 0 12px 0;
  font-size: 0.95rem;
  color: var(--text-main);
}

.mastery-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.badge-evidence {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid transparent;
}

.badge-independent {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border-color: var(--accent-emerald);
}

.badge-agent {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.badge-self-reported {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border-color: var(--accent-amber);
}

.badge-stale {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border-color: var(--accent-rose);
}

.attempts-history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.attempt-record-item {
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.85rem;
}

.attempt-record-item.attempt-passed {
  border-left: 3px solid var(--accent-emerald);
}

.attempt-record-item.attempt-failed {
  border-left: 3px solid var(--accent-rose);
}

.attempt-record-item.attempt-stale {
  border-style: dashed;
  opacity: 0.85;
}

.attempt-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 4px;
}

.attempt-mode {
  font-weight: 600;
  color: var(--text-main);
}

.attempt-score {
  font-weight: 700;
  color: var(--accent-cyan);
}

.attempt-status {
  font-size: 0.8rem;
  padding: 2px 6px;
  border-radius: 4px;
}

.attempt-passed .attempt-status {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.attempt-failed .attempt-status {
  background: rgba(244, 63, 94, 0.2);
  color: var(--accent-rose);
}

.tag-stale {
  color: var(--accent-rose);
  font-size: 0.75rem;
  font-weight: 600;
}

.attempt-time {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.no-attempts-item {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-style: italic;
}

.dev-slice-disclaimer {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
  margin: 0;
  padding: 12px;
  background: var(--bg-secondary);
  border-radius: 6px;
  border: 1px dashed var(--border-color);
}

@media (max-width: 600px) {
  .site-navbar {
    padding: 10px 14px;
  }
  .nav-inner {
    flex-direction: column;
    align-items: stretch;
  }
  .nav-actions {
    justify-content: space-between;
  }
  .main-content {
    padding: 16px 14px 60px;
  }
  .activity-card {
    padding: 16px;
  }
  .exercise-container {
    padding: 14px;
  }
}

/* ==========================================================================
   Calendar & Time Ledger Styles
   ========================================================================== */
.ledger-dashboard {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ledger-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.metric-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  text-align: center;
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.category-ledger-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
}

.category-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 8px;
}

.category-card-header {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-main);
}

.category-card-hours {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-emerald);
}

.category-card-minutes {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.status-legend-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px 18px;
  margin-bottom: 28px;
  font-size: 0.88rem;
  color: var(--text-soft);
}

.topic-blocks-container {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.topic-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.topic-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.topic-block-header h2 {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
  flex: 1 1 auto;
}

.badge-ticket {
  background: rgba(183, 166, 246, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(183, 166, 246, 0.3);
  font-weight: 600;
}

.badge-review {
  background: rgba(242, 197, 114, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(242, 197, 114, 0.3);
  font-weight: 600;
}

.block-days-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.calendar-day-card {
  background: var(--surface-raised);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  transition: border-color 0.2s ease;
}

.calendar-day-card.review-day {
  border-color: rgba(242, 197, 114, 0.5);
  background: linear-gradient(180deg, rgba(242, 197, 114, 0.04) 0%, var(--surface-raised) 100%);
}

.calendar-day-card:hover {
  border-color: var(--accent-cyan);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
}

.day-id-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
}

.status-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

.status-badge.status-available {
  background: rgba(114, 214, 161, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(114, 214, 161, 0.3);
}

.status-badge.status-planned {
  background: rgba(156, 175, 191, 0.12);
  color: var(--text-muted);
  border: 1px solid rgba(156, 175, 191, 0.25);
}

.status-badge.status-reviewed {
  background: rgba(103, 213, 209, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(103, 213, 209, 0.3);
}

.status-badge.status-accepted {
  background: rgba(114, 214, 161, 0.25);
  color: var(--accent-emerald);
  border: 1px solid rgba(114, 214, 161, 0.4);
}

.card-meta-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.card-details {
  font-size: 0.85rem;
  color: var(--text-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.prereq-item, .recovery-item {
  display: inline-block;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.78rem;
  margin: 2px 4px 2px 0;
}

.card-action {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}

.planned-notice-box {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.day-link {
  display: inline-block;
  background: var(--accent-cyan);
  color: var(--bg-primary);
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 6px;
  text-align: center;
  font-size: 0.88rem;
  transition: opacity 0.2s;
}

.day-link:hover {
  opacity: 0.9;
  text-decoration: none;
}

/* ==========================================================================
   Agent Tool Track Selection & Shared Practice (Ticket 11)
   ========================================================================== */
.agent-tracks-section {
  margin: 32px 0;
}

.tracks-disclaimer-box {
  background: rgba(242, 197, 114, 0.08);
  border: 1px solid rgba(242, 197, 114, 0.28);
  border-radius: 8px;
  padding: 12px 16px;
  margin-top: 16px;
}

.tracks-disclaimer {
  color: var(--accent-amber);
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.5;
}

.agent-tracks-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.track-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
}

.track-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.track-card.selected {
  border-color: var(--accent-cyan);
  background: rgba(103, 213, 209, 0.05);
  box-shadow: 0 0 0 1px var(--accent-cyan);
}

.track-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.badge-verified {
  background: rgba(114, 214, 161, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(114, 214, 161, 0.35);
  font-weight: 600;
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.badge-pending {
  background: rgba(242, 197, 114, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(242, 197, 114, 0.35);
  font-weight: 600;
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: 4px;
}

.track-selected-indicator {
  font-size: 0.78rem;
  color: var(--accent-cyan);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.track-name {
  margin: 0 0 8px;
  font-size: 1.25rem;
  color: var(--text-main);
}

.track-summary {
  margin: 0 0 14px;
  font-size: 0.9rem;
  color: var(--text-soft);
  line-height: 1.45;
}

.track-meta-list {
  font-size: 0.86rem;
  color: var(--text-soft);
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  word-break: break-word;
}

.track-meta-list p {
  margin: 0;
  line-height: 1.4;
}

.btn-select-track {
  width: 100%;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: auto;
}

.track-card.selected .btn-select-track {
  background: var(--accent-cyan);
  color: var(--bg-primary);
  border-color: var(--accent-cyan);
}

/* Tool Instructions Panel */
.tool-instructions-container {
  margin: 24px 0;
}

.track-instructions-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
}

.track-instructions-panel h4 {
  margin-top: 0;
  color: var(--accent-cyan);
  font-size: 1.1rem;
}

.tool-operations-content {
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.6;
}

.tool-operations-content code {
  color: var(--accent-cyan);
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Assistance Policy Grid */
.assistance-policy-container {
  margin: 32px 0;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.policy-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
}

.policy-card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--text-main);
}

.policy-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-soft);
  line-height: 1.5;
}

.policy-independent {
  border-top: 3px solid var(--accent-emerald);
}

.policy-agent {
  border-top: 3px solid var(--accent-cyan);
}

.policy-safety {
  border-top: 3px solid var(--accent-rose);
}

/* 7-Step Method Grid */
.seven-steps-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.seven-step-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 12px 16px;
}

.step-badge {
  font-family: monospace;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-cyan);
  background: rgba(103, 213, 209, 0.12);
  padding: 4px 8px;
  border-radius: 4px;
  flex-shrink: 0;
}

.step-body h4 {
  margin: 0 0 4px;
  font-size: 0.98rem;
  color: var(--text-main);
}

.step-body p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-soft);
  line-height: 1.45;
}

.nav-track-link.active {
  color: var(--accent-cyan);
  font-weight: 600;
}


/* Translation-review notice and correction report (spec US59) */
.translation-review-notice {
  margin: 16px 0 24px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-amber);
  border-radius: 6px;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.translation-review-notice[data-edition-state="source-edition"],
.translation-review-notice[data-edition-state="native-reviewed"] {
  border-left-color: var(--accent-emerald);
}

.translation-review-notice p {
  margin: 0;
}

.edition-revision {
  color: var(--text-muted);
  white-space: nowrap;
}

.edition-revision code {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.correction-signin {
  margin-top: 6px !important;
  color: var(--text-muted);
}

.correction-report {
  margin-top: 8px;
}

.correction-report summary {
  cursor: pointer;
  color: var(--accent-cyan);
  user-select: none;
}

#correction-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
  max-width: 100%;
}

#correction-form select,
#correction-form textarea {
  width: 100%;
  max-width: 100%;
  padding: 8px 10px;
  background: var(--code-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font: inherit;
}

#correction-form textarea {
  resize: vertical;
}

#correction-form button {
  align-self: flex-start;
  background: var(--accent-cyan);
  color: #0b0f19;
  border: none;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 6px;
  cursor: pointer;
}

#correction-form button:hover {
  filter: brightness(1.1);
}

#correction-form button:disabled {
  opacity: 0.6;
  cursor: wait;
}

#correction-status:empty {
  display: none;
}