/* ============================================
   DocReview AI — App Tool Styles (MVP)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- Inherit design tokens from style.css --- */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-input: rgba(15, 23, 42, 0.8);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-input: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(59, 130, 246, 0.5);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-blue: #3b82f6;
  --accent-violet: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- App Layout --- */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-header__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  color: var(--text-primary);
}

.app-header__logo-icon {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.app-header__logo span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.app-header__link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.app-header__link:hover {
  color: var(--accent-blue);
}

.app-header__back {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color var(--transition-fast);
}

.app-header__back:hover {
  color: var(--text-primary);
}

/* --- Main Content --- */
.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

/* --- Panel (Left + Right) --- */
.panel {
  padding: 1.5rem;
  overflow-y: auto;
  max-height: calc(100vh - 65px);
}

.panel--input {
  border-right: 1px solid var(--border-glass);
}

.panel__title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- Usage Tracker --- */
.usage-tracker {
  background: linear-gradient(145deg, rgba(59, 130, 246, 0.08), rgba(139, 92, 246, 0.04));
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-xl);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.usage-tracker__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.625rem;
}

.usage-tracker__label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--accent-blue);
}

.usage-tracker__count {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.usage-bar__track {
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
}

.usage-bar__fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width 0.6s ease;
}

.usage-bar__fill--exhausted {
  background: linear-gradient(135deg, var(--accent-rose), var(--accent-amber));
}

/* --- API Key Section --- */
.api-key-section {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.api-key-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.api-key-section__label {
  font-size: 0.875rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.api-key-section__help {
  font-size: 0.75rem;
  color: var(--accent-blue);
  text-decoration: none;
}

.api-key-section__help:hover {
  text-decoration: underline;
}

.api-key-input-wrap {
  display: flex;
  gap: 0.5rem;
}

.api-key-input {
  flex: 1;
  padding: 0.625rem 0.875rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.api-key-input:focus {
  border-color: var(--border-focus);
}

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

.api-key-status {
  font-size: 0.75rem;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.api-key-status--valid {
  color: var(--accent-emerald);
}

.api-key-status--invalid {
  color: var(--accent-rose);
}

/* --- Document Type & Review Options --- */
.config-section {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.config-section__label {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.config-option {
  padding: 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.config-option:hover {
  border-color: rgba(59, 130, 246, 0.3);
  background: rgba(59, 130, 246, 0.05);
}

.config-option.selected {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.1);
  box-shadow: 0 0 0 1px var(--accent-blue);
}

.config-option__icon {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.config-option__label {
  font-size: 0.75rem;
  font-weight: 600;
}

/* Review criteria checkboxes */
.criteria-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.criteria-chip {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.criteria-chip:hover {
  border-color: rgba(59, 130, 246, 0.3);
}

.criteria-chip.active {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.criteria-chip input {
  display: none;
}

/* --- Text Input Area --- */
.text-input-section {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.text-input-section__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.text-input-section__label {
  font-size: 0.875rem;
  font-weight: 600;
}

.text-input-section__count {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.text-input {
  width: 100%;
  min-height: 220px;
  padding: 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: var(--font-family);
  font-size: 0.875rem;
  line-height: 1.7;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-fast);
}

.text-input:focus {
  border-color: var(--border-focus);
}

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

/* File upload area */
.file-upload {
  margin-top: 0.75rem;
  padding: 1.25rem;
  border: 2px dashed var(--border-input);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.file-upload:hover,
.file-upload--dragover {
  border-color: var(--accent-blue);
  background: rgba(59, 130, 246, 0.05);
  transform: translateY(-1px);
}

.file-upload__icon {
  font-size: 1.5rem;
  margin-bottom: 0.375rem;
}

.file-upload__text {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}

.file-upload__text strong {
  color: var(--accent-blue);
}

.file-upload__formats {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.file-upload input {
  display: none;
}

/* File status message */
.file-status {
  font-size: 0.75rem;
  margin-top: 0.5rem;
  padding: 0 0.25rem;
  min-height: 1.25rem;
}

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

.file-status--success {
  color: var(--accent-emerald);
}

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

/* --- Submit Button --- */
.submit-section {
  margin-bottom: 0.75rem;
}

.btn-submit {
  width: 100%;
  padding: 0.875rem 1.5rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-xl);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
}

.btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-submit.loading {
  pointer-events: none;
}

/* --- Disclaimer --- */
.disclaimer {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-align: center;
  padding: 0.5rem;
  line-height: 1.5;
  opacity: 0.7;
}

/* --- Results Panel --- */
.results-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  text-align: center;
  color: var(--text-muted);
}

.results-empty__icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  opacity: 0.3;
}

.results-empty__title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.results-empty__description {
  font-size: 0.875rem;
  max-width: 300px;
}

/* Loading state */
.results-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border-glass);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1.5rem;
}

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

.results-loading__text {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.results-loading__sub {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* --- Review Results --- */
.review-results {
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Score header */
.score-header {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.score-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 800;
  flex-shrink: 0;
  position: relative;
}

.score-circle::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  padding: 3px;
  background: conic-gradient(var(--score-color, var(--accent-blue)) var(--score-pct, 0%), transparent 0%);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
}

.score-circle--high { --score-color: var(--accent-emerald); color: var(--accent-emerald); }
.score-circle--mid { --score-color: var(--accent-amber); color: var(--accent-amber); }
.score-circle--low { --score-color: var(--accent-rose); color: var(--accent-rose); }

.score-info__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.score-info__subtitle {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* Score breakdown bars */
.score-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.score-bar {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 0.875rem;
}

.score-bar__label {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.score-bar__track {
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.score-bar__fill {
  height: 100%;
  border-radius: var(--radius-sm);
  transition: width 1s ease;
}

.score-bar__fill--high { background: var(--accent-emerald); }
.score-bar__fill--mid { background: var(--accent-amber); }
.score-bar__fill--low { background: var(--accent-rose); }

/* Issue cards */
.issues-section {
  margin-bottom: 1.25rem;
}

.issues-section__title {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.issue-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 0.625rem;
  border-left: 3px solid var(--border-glass);
}

.issue-card--critical { border-left-color: var(--accent-rose); }
.issue-card--warning { border-left-color: var(--accent-amber); }
.issue-card--suggestion { border-left-color: var(--accent-blue); }
.issue-card--positive { border-left-color: var(--accent-emerald); }

.issue-card__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.issue-card__severity {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
}

.issue-card__severity--critical { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.issue-card__severity--warning { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }
.issue-card__severity--suggestion { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.issue-card__severity--positive { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }

.issue-card__title {
  font-size: 0.8125rem;
  font-weight: 600;
}

.issue-card__body {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Export actions */
.export-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.btn-export {
  flex: 1;
  padding: 0.625rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
}

.btn-export:hover {
  border-color: var(--accent-blue);
  color: var(--text-primary);
  background: rgba(59, 130, 246, 0.05);
}

/* --- Human Review Upsell CTA --- */
.upsell-cta {
  margin-top: 1.5rem;
  background: linear-gradient(145deg, rgba(139, 92, 246, 0.12), rgba(59, 130, 246, 0.08));
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.upsell-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-violet), var(--accent-cyan));
}

.upsell-cta__icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.upsell-cta__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.upsell-cta__description {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.upsell-cta__features {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1.25rem;
}

.upsell-cta__features li {
  font-size: 0.75rem;
  color: var(--accent-emerald);
  font-weight: 500;
}

.upsell-cta__button {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.75rem 2rem;
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-xl);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.upsell-cta__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .app-main {
    grid-template-columns: 1fr;
  }

  .panel {
    max-height: none;
  }

  .panel--input {
    border-right: none;
    border-bottom: 1px solid var(--border-glass);
  }

  .score-breakdown {
    grid-template-columns: 1fr;
  }

  .upsell-cta__features {
    flex-direction: column;
    align-items: center;
  }
}