/* ==========================================================================
   SIH 2026 Problem Statement Intelligence Dashboard — Stylesheet
   ========================================================================== */

:root {
  /* Dark Theme (Default) */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-accent: rgba(99, 102, 241, 0.35);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  
  --accent-teal: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;
  
  /* Semantic Badges */
  --badge-software-bg: rgba(6, 182, 212, 0.15);
  --badge-software-text: #38bdf8;
  --badge-hardware-bg: rgba(245, 158, 11, 0.15);
  --badge-hardware-text: #fbbf24;
  --badge-verdict-bg: rgba(16, 185, 129, 0.15);
  --badge-verdict-text: #34d399;
  
  /* Layout */
  --header-height: 70px;
  --max-width: 1440px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.2);
  
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.85);
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.12);
  --border-accent: rgba(99, 102, 241, 0.4);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  
  --accent-glow: rgba(99, 102, 241, 0.12);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  line-height: 1.25;
  font-weight: 700;
}

kbd {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--text-secondary);
}

.gradient-text {
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 50%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
}

.nav-left {
  display: flex;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #4f46e5, #9333ea);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.nav-link.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--border-accent);
}

.nav-link i {
  width: 17px;
  height: 17px;
}

.nav-count-badge {
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 10px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.quick-search-trigger {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.quick-search-trigger:hover {
  border-color: var(--border-medium);
  color: var(--text-secondary);
}

.quick-search-trigger i {
  width: 16px;
  height: 16px;
}

.icon-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

/* Mobile Bottom Nav */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  z-index: 1000;
  justify-content: space-around;
  align-items: center;
}

.mobile-nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 500;
}

.mobile-nav-link.active {
  color: var(--accent-primary);
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
  min-height: calc(100vh - var(--header-height) - 150px);
  padding: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Loading & Empty States */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 1.5rem;
  color: var(--text-secondary);
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(99, 102, 241, 0.2);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   Buttons & Core Components
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.5);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.btn-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-primary);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-software {
  background: var(--badge-software-bg);
  color: var(--badge-software-text);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-hardware {
  background: var(--badge-hardware-bg);
  color: var(--badge-hardware-text);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.badge-verdict {
  background: var(--badge-verdict-bg);
  color: var(--badge-verdict-text);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-theme {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.badge-psid {
  font-family: 'JetBrains Mono', monospace;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 700;
}

/* ==========================================================================
   Home / Landing Dashboard View
   ========================================================================== */
.hero-section {
  text-align: center;
  padding: 3rem 1rem 3.5rem;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid var(--border-accent);
  color: #a5b4fc;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.35rem 0.9rem;
  border-radius: 30px;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.25rem;
}

.hero-search-wrapper {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}

.hero-search-box {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border: 2px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.75rem 0.5rem 1.25rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transition: var(--transition);
}

.hero-search-box:focus-within {
  border-color: var(--accent-primary);
}

.hero-search-box i {
  color: var(--text-muted);
  width: 22px;
  height: 22px;
  margin-right: 0.75rem;
}

.hero-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  color: var(--text-primary);
}

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

.quick-pills {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.filter-pill-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
}

.filter-pill-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-card-hover);
}

/* KPI Stats Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 3rem;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.kpi-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md);
}

.kpi-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kpi-icon-box.indigo { background: rgba(99, 102, 241, 0.15); color: #818cf8; }
.kpi-icon-box.cyan { background: rgba(6, 182, 212, 0.15); color: #38bdf8; }
.kpi-icon-box.amber { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.kpi-icon-box.purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.kpi-icon-box.emerald { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.kpi-icon-box.rose { background: rgba(244, 63, 94, 0.15); color: #fb7185; }

.kpi-info {
  display: flex;
  flex-direction: column;
}

.kpi-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.kpi-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 0.25rem;
}

/* Curated Track Buckets */
.home-section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.home-section-header h2 {
  font-size: 1.6rem;
}

.home-section-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.curated-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.curated-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.curated-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

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

.curated-icon {
  font-size: 1.8rem;
}

.curated-count-badge {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 12px;
}

.curated-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.curated-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  flex: 1;
  margin-bottom: 1.25rem;
}

.curated-card-footer {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent-primary);
  font-size: 0.82rem;
  font-weight: 600;
}

/* ==========================================================================
   Problem Explorer View
   ========================================================================== */
.explorer-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.75rem;
  align-items: start;
}

/* Filter Sidebar */
.filter-sidebar {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  max-height: calc(100vh - var(--header-height) - 3rem);
  overflow-y: auto;
}

.filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.25rem;
}

.filter-header h3 {
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.clear-filters-btn {
  background: transparent;
  border: none;
  color: var(--accent-primary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
}

.clear-filters-btn:hover {
  text-decoration: underline;
}

.filter-group {
  margin-bottom: 1.25rem;
}

.filter-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
}

.filter-options-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 180px;
  overflow-y: auto;
  padding-right: 0.35rem;
}

.filter-checkbox-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.84rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.2rem 0;
}

.filter-checkbox-label:hover {
  color: var(--text-primary);
}

.filter-checkbox-label input[type="checkbox"],
.filter-checkbox-label input[type="radio"] {
  margin-right: 0.5rem;
  accent-color: var(--accent-primary);
}

.filter-count {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.filter-select {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 0.45rem 0.6rem;
  font-size: 0.84rem;
  outline: none;
}

.slider-container {
  padding: 0.25rem 0;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.range-slider {
  width: 100%;
  accent-color: var(--accent-primary);
}

/* Explorer Main Content Area */
.explorer-main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.explorer-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1.25rem;
}

.explorer-counter {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.explorer-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.sort-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.sort-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.view-toggle-btns {
  display: flex;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.view-btn {
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-muted);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
}

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

/* Problem Cards Grid */
.problem-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.25rem;
}

.problem-cards-grid.list-view {
  grid-template-columns: 1fr;
}

.problem-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
}

.problem-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.problem-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.card-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.card-actions-quick {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.card-icon-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.card-icon-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.card-icon-btn.saved {
  color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.3);
}

.card-icon-btn.compared {
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--border-accent);
}

.problem-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.6rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.problem-card-title a:hover {
  color: #818cf8;
}

.problem-card-org {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.problem-card-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.6rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.85rem;
  margin-bottom: 1.15rem;
}

.card-metric-col {
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.metric-val {
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-val.score-green { color: #34d399; }
.metric-val.score-amber { color: #fbbf24; }
.metric-val.score-blue { color: #38bdf8; }

.problem-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.team-level-pill {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.view-details-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: var(--transition);
}

.view-details-link:hover {
  gap: 0.55rem;
  color: #818cf8;
}

/* ==========================================================================
   Problem Detail Page View
   ========================================================================== */
.detail-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
  position: relative;
}

.detail-nav-sticky {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1rem;
  max-height: calc(100vh - var(--header-height) - 3rem);
  overflow-y: auto;
}

.detail-nav-sticky h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.detail-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.detail-nav-item {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  display: block;
}

.detail-nav-item:hover, .detail-nav-item.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.detail-nav-item.active {
  color: #818cf8;
  font-weight: 600;
  border-left: 3px solid var(--accent-primary);
}

/* Detail Main Column */
.detail-main-col {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.detail-header-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.detail-top-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.back-to-explore-btn {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

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

.detail-header-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.detail-header-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  line-height: 1.2;
}

.detail-header-org {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Prominent Metrics Header Bar */
.detail-metrics-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.detail-metric-card {
  display: flex;
  flex-direction: column;
}

.detail-metric-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.detail-metric-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  margin: 0.2rem 0;
}

.detail-metric-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Detail Section Card */
.detail-section-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2rem;
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.detail-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.detail-section-header h3 {
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-tag {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}

/* Content blocks */
.info-box-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.info-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}

.info-box h4 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: #a5b4fc;
}

.info-box p, .info-box li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.info-box ul {
  padding-left: 1.25rem;
}

/* Solution Tabs */
.solution-tabs-header {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.solution-tab-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.solution-tab-btn.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.solution-tab-content {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}

/* MVP Grid (4 Columns) */
.mvp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.mvp-column {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  border: 1px solid var(--border-subtle);
}

.mvp-column.must { border-top: 3px solid #10b981; }
.mvp-column.should { border-top: 3px solid #38bdf8; }
.mvp-column.nice { border-top: 3px solid #a855f7; }
.mvp-column.avoid { border-top: 3px solid #f43f5e; }

.mvp-column h4 {
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.mvp-column ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.mvp-column li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.45;
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
}

/* Difficulty Dimension Bar Chart */
.difficulty-bars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 1.5rem;
}

.diff-bar-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.diff-bar-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

.diff-bar-label {
  color: var(--text-secondary);
  font-weight: 500;
}

.diff-bar-val {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
}

.diff-bar-track {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.diff-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, #6366f1, #a855f7);
}

/* Personas & Stakeholders Grid */
.cards-subgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.sub-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.sub-card h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
}

.sub-card .sub-role {
  font-size: 0.8rem;
  color: #818cf8;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

/* User Flow Steps */
.flow-steps-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
}

.flow-step-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
}

.step-num-bubble {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.step-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Compare Matrix View
   ========================================================================== */
.compare-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.compare-table-wrapper {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.compare-table th, .compare-table td {
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.compare-table th {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  width: 180px;
}

.compare-table td {
  min-width: 260px;
}

/* Floating Tray */
.compare-floating-tray {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-radius: 30px;
  padding: 0.6rem 1.25rem;
  z-index: 999;
}

.compare-tray-content {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* ==========================================================================
   Toast Notifications & Modals
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 25px;
  right: 25px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1100;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  padding: 0.75rem 1.1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideUp 0.25s ease;
}

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

/* Command Palette Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  z-index: 2000;
}

.command-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 640px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.command-search-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  gap: 0.75rem;
}

.command-search-header input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.command-results {
  max-height: 380px;
  overflow-y: auto;
  padding: 0.5rem;
}

.command-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.command-footer {
  padding: 0.65rem 1.25rem;
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  gap: 1.25rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.app-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 2rem 2rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-top: 0.75rem;
  max-width: 360px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.footer-col h4 {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: #818cf8;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Utilities */
.hidden { display: none !important; }

/* Responsive adjustments */
@media (max-width: 1024px) {
  .explorer-layout { grid-template-columns: 1fr; }
  .filter-sidebar { position: static; max-height: none; }
  .detail-layout { grid-template-columns: 1fr; }
  .detail-nav-sticky { display: none; }
  .footer-container { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .navbar .nav-center { display: none; }
  .mobile-bottom-nav { display: flex; }
  .main-content { padding: 1.25rem 1rem 5rem; }
  .hero-title { font-size: 2.3rem; }
  .difficulty-bars-grid { grid-template-columns: 1fr; }
  .info-box-grid { grid-template-columns: 1fr; }
}