/* FlexiFormula — Стильдер жүйесі (Dark Theme, KaTeX, Neon Accents, Mobile Responsive) */

:root {
  --bg-main: #0b0f19;
  --bg-sidebar: #0f172a;
  --bg-card: #131d36;
  --bg-card-hover: #182544;
  --bg-surface: #1e293b;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-active: rgba(59, 130, 246, 0.5);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-glow: rgba(59, 130, 246, 0.35);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #8b5cf6;
  --cyan: #06b6d4;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

.app-layout {
  display: flex;
  width: 100vw;
  min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 270px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.brand-logo {
  font-size: 26px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-title {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  width: 100%;
}

.nav-btn:hover {
  background-color: var(--bg-surface);
  color: var(--text-main);
}

.nav-btn.active {
  background-color: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.nav-icon {
  font-size: 18px;
}

.nav-badge {
  margin-left: auto;
  background-color: var(--danger);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.nav-badge.muted {
  background-color: var(--bg-surface);
  color: var(--text-muted);
}

.nav-btn.active .nav-badge {
  background-color: #fff;
  color: var(--primary);
}

.sidebar-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.streak-widget {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
}

.streak-fire {
  font-weight: 700;
  font-size: 14px;
  color: #fb923c;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.streak-goal-text {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.progress-bar-mini {
  width: 100%;
  height: 6px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill-mini {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.sync-status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  padding: 6px 4px;
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--text-dim);
}

.sync-dot.online {
  background-color: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* MAIN CONTENT */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
}

/* TOPBAR */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.topbar-left h1 {
  font-size: 22px;
  font-weight: 700;
}

.profile-pill {
  font-size: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  gap: 10px;
}

/* BUTTONS */
.btn {
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

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

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

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-glow {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #fff;
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.4);
}

.btn-glow:hover {
  transform: scale(1.02);
}

/* TABS */
.tab-panel {
  display: none;
  padding: 32px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.tab-panel.active {
  display: block;
}

/* METRICS GRID */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease;
}

.metric-card:hover {
  transform: translateY(-2px);
}

.metric-card.urgent { border-left: 4px solid var(--danger); }
.metric-card.info { border-left: 4px solid var(--primary); }
.metric-card.warning { border-left: 4px solid var(--warning); }
.metric-card.success { border-left: 4px solid var(--success); }

.metric-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 8px;
}

.metric-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-sub {
  font-size: 11px;
  color: var(--text-dim);
}

/* BANNER */
.dashboard-banner {
  background: linear-gradient(135deg, #1e1b4b, #172554);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.banner-content h2 {
  font-size: 20px;
  margin-bottom: 8px;
  color: #e0e7ff;
}

.banner-content p {
  font-size: 13px;
  color: #a5b4fc;
  max-width: 650px;
  line-height: 1.5;
}

/* SECTION HEADING */
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.section-heading h2 {
  font-size: 20px;
  font-weight: 700;
}

/* DECKS GRID */
.decks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.deck-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.deck-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-active);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.deck-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.deck-icon-badge {
  font-size: 28px;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  flex-shrink: 0;
}

.deck-title-area h3 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 4px;
}

.deck-level-pill {
  font-size: 11px;
  color: var(--text-muted);
}

.deck-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 18px;
  flex: 1;
}

.deck-stats-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.deck-due-pill {
  color: var(--danger);
  font-weight: 700;
}

.deck-action-btn {
  width: 100%;
  padding: 10px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.deck-action-btn:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 10-STEP LADDER */
.ladder-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.ladder-step-row {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s ease;
}

.ladder-step-row:hover {
  border-color: var(--border-active);
}

.ladder-step-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.step-num-pill {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  background-color: var(--bg-surface);
  color: var(--primary);
}

.ladder-step-row.mastered .step-num-pill {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
}

.step-name-main {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}

.step-desc-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.step-count-badge {
  font-size: 14px;
  font-weight: 700;
  background-color: var(--bg-surface);
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

/* STUDY CONTROLS */
.study-control-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.study-filters {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.select-control {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
}

.segmented-control {
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.seg-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.seg-btn.active {
  background-color: var(--primary);
  color: #fff;
}

.study-counter-pill {
  font-size: 14px;
  font-weight: 700;
  background-color: var(--bg-surface);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* STUDY CARD */
.study-card-wrapper {
  max-width: 760px;
  margin: 0 auto;
}

.study-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.study-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background-color: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-color);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.deck-tag, .category-tag, .step-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.deck-tag { background-color: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.category-tag { background-color: var(--bg-surface); color: var(--text-muted); }
.step-badge { background-color: rgba(16, 185, 129, 0.2); color: #34d399; }

.btn-book-page {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: #38bdf8;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-book-page:hover {
  background-color: #0284c7;
  color: #fff;
}

/* 10-STEP SEGMENTED BAR */
.ten-steps-bar {
  display: flex;
  gap: 4px;
  padding: 8px 24px;
  background-color: rgba(0, 0, 0, 0.2);
}

.step-segment {
  flex: 1;
  height: 5px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  transition: all 0.2s ease;
}

.step-segment.filled {
  background-color: var(--success);
}

.step-segment.current {
  background-color: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* CARD BODY */
.study-card-body {
  padding: 36px 32px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.formula-title-kz {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.formula-title-ru {
  font-size: 15px;
  margin-bottom: 24px;
}

.card-hint-text {
  font-size: 13px;
  color: var(--text-dim);
}

/* CARD BACK CONTENT */
.card-back {
  width: 100%;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.formula-display-box {
  background-color: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  margin: 16px 0 24px;
  font-size: 24px;
  color: #93c5fd;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
}

.formula-details-box {
  text-align: left;
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.details-section {
  font-size: 14px;
  line-height: 1.5;
}

.details-label {
  font-weight: 700;
  color: #94a3b8;
  margin-right: 6px;
}

/* CARD FOOTER & SM2 BUTTONS */
.study-card-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.01);
}

.btn-reveal {
  width: 100%;
  padding: 16px;
  background-color: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: all 0.2s ease;
}

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

.sm2-rating-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.sm2-btn {
  padding: 12px 8px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
  color: #fff;
}

.sm2-btn:hover {
  transform: translateY(-2px);
}

.btn-again { background-color: #dc2626; }
.btn-hard  { background-color: #d97706; }
.btn-good  { background-color: #2563eb; }
.btn-easy  { background-color: #059669; }

.sm2-title { font-size: 13px; font-weight: 700; }
.sm2-interval { font-size: 11px; opacity: 0.85; }
.sm2-key { font-size: 10px; opacity: 0.6; }

/* QUIZ MODE */
.quiz-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.quiz-badge {
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 6px;
}

.quiz-formula-name {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin: 10px 0 24px;
}

.quiz-options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.quiz-option-btn {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  font-size: 18px;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.2s ease;
}

.quiz-option-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-active);
}

.quiz-option-btn.correct {
  background-color: rgba(16, 185, 129, 0.2);
  border-color: var(--success);
  color: #34d399;
}

.quiz-option-btn.incorrect {
  background-color: rgba(239, 68, 68, 0.2);
  border-color: var(--danger);
  color: #f87171;
}

/* TILES BUILDER */
.tiles-container, .blank-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.tiles-target-name, .blank-target-name {
  font-size: 22px;
  font-weight: 800;
  color: #60a5fa;
  margin: 8px 0 20px;
}

.tiles-assembly-area {
  min-height: 80px;
  background-color: var(--bg-surface);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 24px;
}

.tiles-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.tile-token-btn {
  background-color: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tile-token-btn:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.tile-token-btn.used {
  opacity: 0.3;
  pointer-events: none;
}

.tiles-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* BLANK FILL MODE */
.blank-formula-box {
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  font-size: 24px;
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.blank-input-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.input-control {
  flex: 1;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 15px;
  color: var(--text-main);
  outline: none;
}

.input-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

/* CATALOG GRID */
.catalog-toolbar {
  display: flex;
  gap: 14px;
  margin-bottom: 24px;
}

.search-input {
  flex: 1;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  font-size: 15px;
  color: var(--text-main);
  outline: none;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 18px;
}

.catalog-item-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
}

.catalog-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.catalog-item-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}

.catalog-formula-box {
  background-color: var(--bg-surface);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 12px;
  display: flex;
  justify-content: center;
  font-size: 18px;
}

/* CALCULATOR */
.calc-workbench {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 20px;
}

.calc-selector-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}

.calc-formula-preview {
  font-size: 26px;
  padding: 20px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  justify-content: center;
}

.calc-inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.calc-field label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.calc-result-box {
  background: linear-gradient(135deg, #1e1b4b, #172554);
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.calc-result-value {
  font-size: 36px;
  font-weight: 800;
  color: #38bdf8;
  margin: 8px 0;
}

/* STATS */
.stats-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}

.stats-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
}

.stats-huge-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin: 10px 0 6px;
}

.distribution-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.dist-bar-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
}

.dist-bar-label {
  width: 140px;
  color: var(--text-muted);
}

.dist-bar-track {
  flex: 1;
  height: 12px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.dist-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6, #10b981);
  border-radius: var(--radius-full);
}

/* SYNC / PHONE */
.sync-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 680px;
  margin: 0 auto;
}

.lan-urls-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0;
}

.url-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
}

.url-item a {
  color: #38bdf8;
  text-decoration: none;
  font-weight: 600;
}

.qr-box {
  display: flex;
  justify-content: center;
  margin: 24px 0;
}

.sync-key-input-row {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-dialog {
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 900px;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background-color: #000;
  display: flex;
  justify-content: center;
}

.page-image-scroll img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 20px rgba(0,0,0,0.8);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-top: 1px solid var(--border-color);
}

.hidden {
  display: none !important;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
  }
  .main-content {
    height: auto;
  }
  .tab-panel {
    padding: 16px;
  }
  .sm2-rating-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}