/* ==========================================================================
   SkillSwap - Design System & Modern Stylesheet
   ========================================================================== */

:root {
  /* Color Tokens - Light Theme */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-modal: #ffffff;
  --bg-drawer: #ffffff;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-strong: #94a3b8;
  
  /* Brand Accents */
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-light: #ccfbf1;
  --primary-text: #115e59;
  --primary-glow: rgba(13, 148, 136, 0.15);
  
  --secondary: #f97316;
  --secondary-hover: #ea580c;
  --secondary-light: #ffedd5;
  --secondary-text: #9a3412;
  
  --accent-blue: #0284c7;
  --accent-blue-light: #e0f2fe;
  --accent-purple: #7c3aed;
  --accent-purple-light: #ede9fe;
  --accent-emerald: #10b981;
  --accent-emerald-light: #d1fae5;
  
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --danger: #ef4444;
  --danger-bg: #fef2f2;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 14px 28px rgba(15, 23, 42, 0.09), 0 10px 10px rgba(15, 23, 42, 0.04);

  /* Geometry & Transitions */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', var(--font-main);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: #131d31;
  --bg-card-hover: #17233c;
  --bg-modal: #111a2e;
  --bg-drawer: #0f172a;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --border-subtle: #1e293b;
  --border-medium: #334155;
  --border-strong: #475569;
  
  --primary: #14b8a6;
  --primary-hover: #2dd4bf;
  --primary-light: rgba(20, 184, 166, 0.15);
  --primary-text: #5eead4;
  --primary-glow: rgba(20, 184, 166, 0.25);
  
  --secondary: #fb923c;
  --secondary-hover: #fdba74;
  --secondary-light: rgba(251, 146, 60, 0.15);
  --secondary-text: #fdba74;
  
  --accent-blue-light: rgba(56, 189, 248, 0.15);
  --accent-purple-light: rgba(168, 85, 247, 0.15);
  --accent-emerald-light: rgba(52, 211, 153, 0.15);
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 30px rgba(0, 0, 0, 0.6);
  --shadow-hover: 0 16px 32px rgba(0, 0, 0, 0.6);
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
  font-size: 0.9375rem;
}

input, select, textarea {
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1.5rem;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary) 0%, #0284c7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.25rem;
  box-shadow: 0 4px 10px var(--primary-glow);
  flex-shrink: 0;
}

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

.logo-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.logo-title span {
  color: var(--primary);
}

.logo-tagline {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

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

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  position: relative;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.badge-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--secondary);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-secondary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

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

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--secondary);
  color: #ffffff;
}

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

.btn-outline {
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
}

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

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

.mobile-menu-btn {
  display: none;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  padding: 4.5rem 0 3.5rem;
  position: relative;
  background: radial-gradient(circle at 50% 0%, var(--primary-light) 0%, transparent 65%);
}

.hero-content {
  text-align: center;
  max-width: 840px;
  margin: 0 auto;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-text);
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.hero-pill-badge {
  background: var(--primary);
  color: #ffffff;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}

.hero-title .highlight {
  color: var(--primary);
  position: relative;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

/* Hero Quick Match Box */
.hero-match-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-xl);
  max-width: 920px;
  margin: 0 auto 3rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.match-inputs-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 1rem;
  align-items: center;
}

.match-input-group {
  text-align: left;
}

.match-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.match-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.85rem;
  gap: 0.5rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.match-input-wrapper:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-secondary);
}

.match-input-wrapper input {
  border: none;
  background: transparent;
  width: 100%;
  outline: none;
  font-weight: 500;
}

.match-divider-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 700;
}

/* Quick Skill Tags under Matcher */
.hero-popular-tags {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-right: 0.25rem;
}

.skill-pill {
  font-size: 0.8125rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.skill-pill:hover {
  background: var(--primary-light);
  color: var(--primary-text);
  border-color: var(--primary);
  transform: translateY(-1px);
}

/* Community Stats Row */
.stats-banner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -0.75rem;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 0.15rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.375rem);
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Filter & Search Controls (Explore Section)
   ========================================================================== */
.controls-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.search-and-dropdowns {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-bar-wrapper {
  flex: 1;
  min-width: 260px;
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.85rem;
  gap: 0.6rem;
  transition: all var(--transition-fast);
}

.search-bar-wrapper:focus-within {
  border-color: var(--primary);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-bar-wrapper input {
  border: none;
  background: transparent;
  width: 100%;
  outline: none;
}

.filter-select {
  padding: 0.65rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.filter-select:focus {
  border-color: var(--primary);
}

/* Category Tabs */
.category-tabs-scroll {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  scrollbar-width: thin;
}

.category-tab {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

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

.category-tab.active {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

/* Results Info Bar */
.results-info-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.results-count b {
  color: var(--text-primary);
}

/* ==========================================================================
   Peer Swap Cards Grid
   ========================================================================== */
.peer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.5rem;
}

.peer-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
}

.peer-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-medium);
}

/* Top: User Meta */
.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.user-meta-group {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.avatar-wrapper {
  position: relative;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  overflow: visible;
  flex-shrink: 0;
}

.avatar-img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
  background: var(--bg-tertiary);
  border: 2px solid var(--bg-secondary);
}

.status-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 13px;
  height: 13px;
  background: var(--success);
  border: 2px solid var(--bg-card);
  border-radius: var(--radius-full);
}

.user-details {
  display: flex;
  flex-direction: column;
}

.user-name-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.user-name {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
}

.verified-icon {
  color: var(--primary);
  font-size: 0.9375rem;
}

.user-location {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.card-rating-badge {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--warning-bg);
  color: #b45309;
  padding: 0.25rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 700;
}

[data-theme="dark"] .card-rating-badge {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
}

/* Middle: Swap Exchange Box */
.swap-box {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border: 1px solid var(--border-subtle);
}

.swap-side {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.swap-side-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.label-teach {
  color: var(--primary-text);
}

[data-theme="dark"] .label-teach {
  color: var(--primary-text);
}

.label-learn {
  color: var(--secondary-text);
}

.swap-skill-main {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.level-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.level-expert {
  background: var(--primary-light);
  color: var(--primary-text);
}

.level-intermediate {
  background: var(--accent-blue-light);
  color: #0369a1;
}

[data-theme="dark"] .level-intermediate {
  color: #38bdf8;
}

.level-beginner {
  background: var(--secondary-light);
  color: var(--secondary-text);
}

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

.swap-connector-line {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 14px;
}

.swap-connector-line::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border-medium);
}

.swap-arrow-pill {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  padding: 0.1rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.peer-bio {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

.card-meta-pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.meta-pill {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* Card Actions */
.card-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

/* Match Score Tag */
.match-score-badge {
  position: absolute;
  top: -10px;
  right: 18px;
  background: linear-gradient(135deg, #10b981 0%, #0d9488 100%);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 800;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  gap: 0.25rem;
  letter-spacing: 0.02em;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-xl);
  grid-column: 1 / -1;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* ==========================================================================
   Study Pods / Co-Learning Rooms Section
   ========================================================================== */
.pods-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.pod-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.pod-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.pod-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.pod-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.live-pulse {
  width: 6px;
  height: 6px;
  background: var(--danger);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 6px rgba(239, 68, 68, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.pod-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.pod-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.pod-attendees {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.avatar-stack {
  display: flex;
  align-items: center;
}

.avatar-stack-item {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-card);
  margin-left: -8px;
  object-fit: cover;
}

.avatar-stack-item:first-child {
  margin-left: 0;
}

.attendee-count {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

.step-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2.25rem 1.75rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal);
  position: relative;
}

.step-card:hover {
  transform: translateY(-4px);
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.step-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Testimonials & Trust Center
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
}

.testimonial-quote {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-style: italic;
  line-height: 1.6;
}

.swap-tag-badge {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--bg-tertiary);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  color: var(--primary-text);
  margin-bottom: 0.5rem;
  display: inline-block;
}

/* Accordion FAQ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--primary);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-icon {
  font-size: 1.25rem;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 1.5rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 250px;
  padding: 0 1.5rem 1.25rem;
}

/* ==========================================================================
   Modals & Drawers
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: var(--bg-modal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-normal);
  position: relative;
}

.modal-backdrop.open .modal-box {
  transform: scale(1) translateY(0);
}

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

.modal-title {
  font-size: 1.375rem;
  font-weight: 800;
}

.close-modal-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.close-modal-btn:hover {
  background: var(--border-subtle);
  color: var(--text-primary);
}

/* Forms in Modal */
.form-grid {
  display: grid;
  gap: 1.25rem;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  text-align: left;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

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

/* Sliding Drawer for "My Swaps & Chat" */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(3px);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.drawer-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 480px;
  background: var(--bg-drawer);
  border-left: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xl);
  z-index: 1060;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.drawer-backdrop.open .drawer-panel {
  transform: translateX(0);
}

.drawer-header {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.drawer-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
}

.drawer-tab-btn {
  flex: 1;
  padding: 0.85rem 1rem;
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.drawer-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--bg-drawer);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Swap Proposal Tracker Item */
.proposal-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-xs);
}

.proposal-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.status-pending {
  background: var(--warning-bg);
  color: #b45309;
}

.status-accepted {
  background: var(--success-bg);
  color: #065f46;
}

/* Chat Simulation inside Drawer */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-peer-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.chat-messages-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
  padding: 0.5rem 0;
  max-height: 420px;
}

.chat-bubble {
  max-width: 80%;
  padding: 0.65rem 0.95rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  line-height: 1.45;
}

.bubble-received {
  align-self: flex-start;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-bottom-left-radius: 4px;
}

.bubble-sent {
  align-self: flex-end;
  background: var(--primary);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

.chat-timestamp {
  font-size: 0.6875rem;
  margin-top: 0.25rem;
  opacity: 0.75;
}

.chat-input-bar {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.chat-input {
  flex: 1;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
  outline: none;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 2000;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  pointer-events: auto;
  animation: slideInToast 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInToast {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.toast.toast-exit {
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.25s ease;
}

.toast-icon {
  font-size: 1.25rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-col-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

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

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--primary);
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .steps-grid, .testimonials-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .stats-banner {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item:nth-child(2)::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .match-inputs-grid {
    grid-template-columns: 1fr;
  }
  .match-divider-icon {
    margin: 0 auto;
    transform: rotate(90deg);
  }
  .stats-banner {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .stat-item::after {
    display: none !important;
  }
  .peer-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  .form-row-2 {
    grid-template-columns: 1fr;
  }
}