/**
 * @file public/css/styles.css
 * @description Основные стили для NeurA Research
 */

/* CSS Variables */
:root {
  --primary-color: #4a90d9;
  --primary-hover: #3a7bc8;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --info-color: #17a2b8;

  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #2d2d2d;
  --bg-card: #252525;

  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-muted: #6c757d;

  --border-color: #333;
  --border-radius: 8px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);

  --transition: all 0.2s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* Header */
.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.header-logo svg {
  width: 32px;
  height: 32px;
  fill: var(--primary-color);
}

.header-logo h1 {
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Version Badge */
.version-badge {
  font-size: 0.65em;
  color: var(--primary-color);
  background: rgba(74, 144, 217, 0.15);
  padding: 3px 8px;
  border-radius: 6px;
  font-weight: 500;
}

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

/* Balance Popover (Standard) */
.balance-popover-wrapper {
  position: relative;
}

.balance-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.balance-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.balance-toggle svg {
  width: 20px;
  height: 20px;
}

.balance-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  z-index: 1000;
}

.balance-popover[hidden] {
  display: none;
}

.balance-popover__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.balance-popover__title {
  font-weight: 600;
  font-size: 0.875rem;
}

.balance-popover__close {
  border: none;
  background: transparent;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  padding: 0;
}

.balance-popover__close:hover {
  color: var(--text-primary);
}

.balance-popover__value {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.balance-popover__updated {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.balance-popover__actions {
  display: flex;
  gap: 0.75rem;
}

.balance-popover__actions button {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: none;
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--primary-color);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.balance-popover__actions button:hover {
  background: var(--primary-color);
  color: white;
}

.balance-popover__topup {
  flex: 1;
  padding: 0.5rem 0.75rem;
  text-align: center;
  text-decoration: none;
  border-radius: 6px;
  background: var(--primary-color);
  color: white;
  font-weight: 600;
  transition: var(--transition);
}

.balance-popover__topup:hover {
  background: var(--primary-hover);
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.card-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.card-body {
  padding: 1.5rem;
}

/* Research Form */
.research-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  line-height: 1.4;
}

.form-control {
  padding: 0.75rem 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.2);
}

textarea.form-control {
  min-height: 120px;
  max-height: 500px;
  resize: vertical;
  overflow-y: auto;
}

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

/* Options Grid */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.option-select {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.option-select label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 0.6rem;
  font-weight: 600;
  cursor: help;
  text-transform: none;
  letter-spacing: 0;
}

.info-icon:hover {
  background: var(--primary-color);
  color: white;
}

.option-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
  line-height: 1.4;
}

.option-select select {
  padding: 0.5rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
}

.option-select select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

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

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

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

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* Progress */
.progress-container {
  margin: 1.5rem 0;
}

.progress-bar-wrapper {
  background: var(--bg-primary);
  border-radius: 9999px;
  height: 8px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary-color);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Phase Indicator */
.phase-indicator {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.phase-badge {
  padding: 0.25rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 9999px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.phase-badge.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.phase-badge.completed {
  background: var(--success-color);
  border-color: var(--success-color);
  color: white;
}

/* Research Result */
.research-result {
  margin-top: 2rem;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.quality-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
}

.quality-badge.high {
  background: rgba(40, 167, 69, 0.2);
  color: var(--success-color);
}

.quality-badge.medium {
  background: rgba(255, 193, 7, 0.2);
  color: var(--warning-color);
}

.quality-badge.low {
  background: rgba(220, 53, 69, 0.2);
  color: var(--danger-color);
}

/* Report Content */
.report-content {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  line-height: 1.8;
}

.report-content h1,
.report-content h2,
.report-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.report-content h1 { font-size: 1.5rem; }
.report-content h2 { font-size: 1.25rem; }
.report-content h3 { font-size: 1.1rem; }

.report-content p {
  margin-bottom: 1rem;
}

.report-content ul, .report-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.report-content li {
  margin-bottom: 0.5rem;
}

.report-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--text-secondary);
}

.report-content code {
  background: var(--bg-tertiary);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 0.875em;
}

.report-content pre {
  background: var(--bg-tertiary);
  padding: 1rem;
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: 1rem 0;
}

.report-content pre code {
  background: none;
  padding: 0;
}

.report-content a {
  color: var(--primary-color);
  text-decoration: none;
}

.report-content a:hover {
  text-decoration: underline;
}

/* Sources */
.sources-section {
  margin-top: 2rem;
}

.sources-section h3 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.sources-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.source-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.source-index {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary-color);
  min-width: 1.5rem;
}

.source-content {
  flex: 1;
}

.source-title {
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.source-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.source-title a:hover {
  color: var(--primary-color);
}

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

.source-authority {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 9999px;
  margin-left: 0.5rem;
}

.source-authority.high { color: var(--success-color); }
.source-authority.medium { color: var(--warning-color); }
.source-authority.low { color: var(--danger-color); }

/* Clarification Questions */
.clarification-card {
  background: var(--bg-card);
  border: 1px solid var(--warning-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin: 1rem 0;
}

.clarification-card h3 {
  color: var(--warning-color);
  margin-bottom: 1rem;
}

.clarification-questions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.clarification-question {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.clarification-question label {
  font-weight: 500;
}

/* History */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.history-item {
  display: flex;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.history-item:hover {
  background: var(--bg-hover);
}

.history-item-content {
  flex: 1;
}

.history-item-query {
  font-weight: 500;
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.history-item-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-item-status {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.history-item-status.completed {
  background: rgba(40, 167, 69, 0.2);
  color: var(--success-color);
}

.history-item-status.in_progress {
  background: rgba(23, 162, 184, 0.2);
  color: var(--info-color);
}

.history-item-status.failed {
  background: rgba(220, 53, 69, 0.2);
  color: var(--danger-color);
}

.history-item-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.history-item-actions .btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
}

.history-item-actions .btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.history-item-actions .btn-icon:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.history-item-actions .btn-icon svg {
  flex-shrink: 0;
}

.quality-chip {
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
}

.quality-chip.high {
  background: rgba(40, 167, 69, 0.2);
  color: var(--success-color);
}

.quality-chip.medium {
  background: rgba(255, 193, 7, 0.2);
  color: #ffc107;
}

.quality-chip.low {
  background: rgba(220, 53, 69, 0.2);
  color: var(--danger-color);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success { border-left: 4px solid var(--success-color); }
.toast.error { border-left: 4px solid var(--danger-color); }
.toast.warning { border-left: 4px solid var(--warning-color); }
.toast.info { border-left: 4px solid var(--info-color); }

/* Loading Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-content {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
}

/* Utilities */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Responsive */
@media (max-width: 768px) {
  .header {
    padding: 1rem;
  }

  .main-content {
    padding: 1rem;
  }

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

  .result-header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}

/* Quality Explainer — пояснение под бейджем качества */
.quality-explainer {
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.quality-explainer.high {
  color: var(--success-color);
  background: rgba(40, 167, 69, 0.1);
}

.quality-explainer.medium {
  color: var(--warning-color);
  background: rgba(255, 193, 7, 0.1);
}

.quality-explainer.low {
  color: var(--danger-color);
  background: rgba(220, 53, 69, 0.1);
}

/* Source items — кликабельные карточки-ссылки */
.source-item-link {
  text-decoration: none;
  color: inherit;
  display: block;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.source-item-link:hover .source-item {
  border-color: var(--primary-color);
  background: var(--bg-tertiary);
}

.source-item-link:hover .source-title-text {
  color: var(--primary-color);
}

.source-title-text {
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.source-authority-info {
  margin-top: 0.375rem;
}

.source-authority-info .source-authority {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  display: inline-block;
}

/* Progress text animation */
#progress-text {
  transition: opacity 0.15s ease;
}

/* ═══════════════════════════════════════
   Grade Badge + Tooltip
   ═══════════════════════════════════════ */

.grade-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.grade-badge .grade-letter {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

.grade-badge .grade-label {
  font-size: 0.75rem;
  opacity: 0.85;
}

.grade-badge .grade-tooltip {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: #1f2937;
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 400;
  width: 240px;
  text-align: center;
  z-index: 10;
  white-space: normal;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  pointer-events: none;
}

.grade-badge .grade-tooltip::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: #1f2937;
}

.grade-badge:hover .grade-tooltip {
  display: block;
}

.grade-badge.grade-a {
  background: rgba(40, 167, 69, 0.15);
  color: #28a745;
  border: 1px solid rgba(40, 167, 69, 0.3);
}

.grade-badge.grade-b {
  background: rgba(74, 144, 217, 0.15);
  color: #4a90d9;
  border: 1px solid rgba(74, 144, 217, 0.3);
}

.grade-badge.grade-c {
  background: rgba(255, 193, 7, 0.15);
  color: #ffc107;
  border: 1px solid rgba(255, 193, 7, 0.3);
}

.grade-badge.grade-f {
  background: rgba(220, 53, 69, 0.15);
  color: #dc3545;
  border: 1px solid rgba(220, 53, 69, 0.3);
}

/* ═══════════════════════════════════════
   Grade Warning Blocks (C/F)
   ═══════════════════════════════════════ */

.grade-warning {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.grade-warning-c {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #f59e0b;
}

.grade-warning-f {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #ef4444;
}

.grade-warning .warning-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.grade-warning .warning-text {
  font-size: 13px;
  line-height: 1.4;
}

/* ═══════════════════════════════════════
   Quality Metrics Grid
   ═══════════════════════════════════════ */

.quality-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
}

.quality-metrics .metric-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  min-width: 4.5rem;
}

.quality-metrics .metric-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.quality-metrics .metric-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}