@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@1,500;1,600&family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --text-primary: #0a0a0a;
  --text-secondary: #606067;
  --text-muted: #8e8e93;
  --accent-black: #000000;
  --accent-white: #ffffff;
  --border-light: #e5e5ea;
  --bg-header: rgba(255, 255, 255, 0.85);
  
  --bg-badge: rgba(255, 255, 255, 0.95);
  --border-badge: rgba(255, 255, 255, 0.6);
  
  --badge-green-bg: #ecfdf5;
  --badge-green-text: #059669;
  --badge-blue-bg: #eff6ff;
  --badge-blue-text: #2563eb;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.1);
  
  --container-max-width: 1200px;
}

[data-theme="dark"] {
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-black: #ffffff;
  --accent-white: #000000;
  --border-light: #27272a;
  --bg-header: rgba(9, 9, 11, 0.85);

  --bg-badge: rgba(24, 24, 27, 0.95);
  --border-badge: rgba(255, 255, 255, 0.12);

  --badge-green-bg: #064e3b;
  --badge-green-text: #34d399;
  --badge-blue-bg: #1e3a8a;
  --badge-blue-text: #60a5fa;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navbar */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-smooth);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 32px;
  height: 38px;
  background-color: var(--accent-black);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.logo:hover .logo-icon {
  transform: scale(1.05);
}

.logo-text {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background-color: var(--accent-black);
  transition: var(--transition-smooth);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  padding: 6px 12px;
  border-radius: 20px;
  transition: var(--transition-smooth);
}

.lang-toggle:hover {
  background-color: var(--accent-gray-light);
  color: var(--text-primary);
}

.lang-toggle svg {
  width: 16px;
  height: 16px;
}

/* Search Bar */
.search-container {
  position: relative;
  width: 200px;
  transition: var(--transition-smooth);
}

.search-container:focus-within {
  width: 260px;
}

.search-input {
  width: 100%;
  padding: 10px 16px 10px 38px;
  border-radius: 9999px;
  border: 1px solid var(--border-light);
  background-color: var(--bg-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-smooth);
}

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

.search-input:focus {
  border-color: var(--accent-black);
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-sm);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-icon svg {
  width: 14px;
  height: 14px;
}

/* Action Buttons */
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  position: relative;
}

.icon-btn:hover {
  background-color: var(--accent-gray-light);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

.cart-count {
  position: absolute;
  top: 2px;
  right: 2px;
  background-color: var(--accent-black);
  color: var(--accent-white);
  font-size: 9px;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--accent-black);
  color: var(--accent-white);
  border: none;
  border-radius: 9999px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary svg {
  width: 14px;
  height: 14px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
  border-radius: 9999px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-secondary:hover {
  background-color: var(--accent-gray-light);
  border-color: var(--text-primary);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
}

/* Hero Section */
.hero {
  padding: 80px 0 100px 0;
  overflow: visible;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.badge-new {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--accent-gray-light);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 72px;
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -2px;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-title span.italic-serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  letter-spacing: -1px;
  display: block;
}

.hero-description {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 460px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  border-top: 1px solid var(--border-light);
  padding-top: 32px;
  width: 100%;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-val {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-lbl {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 600;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background-color: var(--border-light);
}

/* Hero Media Area */
.hero-media {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img-wrapper {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 0.9;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
  background-color: var(--bg-secondary);
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 6s ease;
}

.hero-img-wrapper:hover .hero-img {
  transform: scale(1.05);
}

/* Floating Badges */
.floating-badge {
  position: absolute;
  background: var(--bg-badge);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 16px 20px;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-badge);
  z-index: 10;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  animation: float 4s ease-in-out infinite;
}

.badge-top-right {
  top: 40px;
  right: -30px;
  max-width: 220px;
}

.badge-bottom-left {
  bottom: 40px;
  left: -30px;
  animation-delay: -2s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.badge-icon-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.badge-icon-circle.green {
  background-color: var(--badge-green-bg);
  color: var(--badge-green-text);
}

.badge-icon-circle.blue {
  background-color: var(--badge-blue-bg);
  color: var(--badge-blue-text);
}

.badge-icon-circle svg {
  width: 18px;
  height: 18px;
}

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

.badge-sub {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--text-muted);
}

.badge-main {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 2px;
}

.badge-desc {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Category Section */
.categories {
  padding: 80px 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -1px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.category-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  padding: 32px;
  text-decoration: none;
  color: var(--text-primary);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: var(--accent-black);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-smooth);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-black);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: var(--transition-smooth);
}

.category-card:hover .category-icon {
  background-color: var(--accent-black);
  color: var(--accent-white);
}

.category-icon svg {
  width: 22px;
  height: 22px;
}

.category-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.category-count {
  font-size: 13px;
  color: var(--text-muted);
}

/* Slider Section (Featured Notes) */
.featured-notes {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-light);
}

.slider-controls {
  display: flex;
  gap: 12px;
}

.slider-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-light);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.slider-btn:hover {
  background-color: var(--accent-black);
  color: var(--accent-white);
  border-color: var(--accent-black);
}

.slider-btn svg {
  width: 18px;
  height: 18px;
}

.slider-outer {
  overflow: hidden;
  margin: 0 -12px;
  padding: 12px;
}

.slider-inner {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.note-card {
  min-width: calc(33.333% - 16px);
  width: calc(33.333% - 16px);
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

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

.note-card-header {
  height: 160px;
  background: linear-gradient(135deg, #18181b 0%, #09090b 100%);
  padding: 24px;
  color: var(--accent-white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.note-card-header::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: radial-gradient(circle at 100% 0%, rgba(255,255,255,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.note-tag {
  align-self: flex-start;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  background-color: rgba(255, 255, 255, 0.15);
  padding: 4px 10px;
  border-radius: 12px;
  backdrop-filter: blur(4px);
}

.note-university {
  font-size: 12px;
  opacity: 0.7;
}

.note-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.note-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: 1.3;
}

.note-author {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.note-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.note-price {
  font-size: 20px;
  font-weight: 700;
}

/* Sell Form Section */
.sell-section {
  padding: 100px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
}

.sell-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: flex-start;
}

.sell-info h2 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.sell-info p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
}

.sell-steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.step-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--accent-black);
  color: var(--accent-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0;
}

.sell-form-wrapper {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 28px;
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  background-color: var(--bg-secondary);
  transition: var(--transition-smooth);
}

.form-control:focus {
  border-color: var(--accent-black);
  background-color: var(--bg-primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.file-upload-area {
  border: 2px dashed var(--border-light);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition-smooth);
  background-color: var(--bg-secondary);
}

.file-upload-area:hover {
  border-color: var(--accent-black);
  background-color: var(--bg-primary);
}

.file-upload-icon {
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.file-upload-icon svg {
  width: 32px;
  height: 32px;
}

.file-upload-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
}

.file-upload-subtext {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.file-input {
  display: none;
}

footer {
  background-color: #09090b !important;
  color: #a1a1aa !important;
  padding: 80px 0 40px 0;
  border-top: 1px solid #27272a;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand .logo-text {
  color: #ffffff !important;
}

.footer-brand .logo-icon {
  background-color: #ffffff !important;
}

.footer-brand p {
  font-size: 14px;
  margin-top: 16px;
  line-height: 1.6;
  max-width: 240px;
}

.footer-title {
  color: #ffffff !important;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #a1a1aa;
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition-smooth);
}

.footer-links a:hover {
  color: #ffffff !important;
}

.footer-bottom {
  border-top: 1px solid #27272a;
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
}

.footer-socials {
  display: flex;
  gap: 16px;
}

.footer-social-link {
  color: #a1a1aa;
  transition: var(--transition-smooth);
}

.footer-social-link:hover {
  color: #ffffff !important;
}

.footer-social-link svg {
  width: 18px;
  height: 18px;
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--bg-primary);
  border-radius: 28px;
  width: 100%;
  max-width: 440px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

.modal.active .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
}

.modal-close:hover {
  background-color: var(--accent-gray-light);
  color: var(--text-primary);
}

.modal-close svg {
  width: 20px;
  height: 20px;
}

.modal-header {
  margin-bottom: 24px;
}

.modal-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

/* Notification styling */
.notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--accent-black);
  color: var(--accent-white);
  padding: 16px 24px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  z-index: 2000;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition-smooth);
}

.notification.active {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive CSS */
@media (max-width: 1024px) {
  .hero-grid {
    gap: 40px;
  }
  .hero-title {
    font-size: 56px;
  }
  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .note-card {
    min-width: calc(50% - 12px);
    width: calc(50% - 12px);
  }
  .sell-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 768px) {
  .navbar {
    height: 70px;
  }
  .nav-menu {
    display: none; /* simple toggle for mobile later or simplified */
  }
  .search-container {
    display: none; /* Hide on small mobile to save space */
  }
  .hero {
    padding: 40px 0 60px 0;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }
  .hero-content {
    align-items: center;
  }
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-ctas {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .floating-badge {
    display: none; /* Hide floating badges on mobile for layout sanity */
  }
  .categories-grid {
    grid-template-columns: 1fr;
  }
  .note-card {
    min-width: 100%;
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* User Avatars & Profile Styles */
.note-author-pic {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border-light);
}

.note-author-placeholder {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--accent-black);
  color: var(--accent-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
}

/* Star Rating & Selection */
.rating-stars {
  display: inline-flex;
  color: #f59e0b;
  font-size: 12px;
  gap: 2px;
  align-items: center;
}

.rating-stars.empty {
  color: #e5e5ea;
}

.star-select {
  transition: color 0.15s ease;
}

.star-select.active {
  color: #f59e0b;
}

/* Reviews List Layout */
.review-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
}

.review-item:last-child {
  border-bottom: none;
}

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
}

.review-user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.review-user-placeholder {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: var(--accent-black);
  color: var(--accent-white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
}

.review-comment {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  padding-left: 36px;
}

.review-date {
  font-size: 11px;
  color: var(--text-muted);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-smooth);
  width: 38px;
  height: 38px;
}
.theme-toggle-btn:hover {
  background-color: var(--bg-secondary);
}

/* Purchased Notes Section inside Profile card */
.purchased-list {
  margin-top: 36px;
  text-align: left;
  border-top: 1px solid var(--border-light);
  padding-top: 28px;
}
.purchased-list h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.purchased-items-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.purchased-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border: 1px solid var(--border-light);
  border-radius: 16px;
  background-color: var(--bg-secondary);
  transition: var(--transition-smooth);
}
.purchased-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.purchased-item-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.purchased-item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}
.purchased-item-author {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Responsive adjustments for subpages and modals */
@media (max-width: 968px) {
  .detail-grid {
    display: flex;
    flex-direction: column;
  }
  .sticky-card {
    order: -1;
    position: static;
    margin-bottom: 32px;
    width: 100%;
  }
}

@media (max-width: 500px) {
  .purchased-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .purchased-item > div {
    width: 100%;
  }
  .purchased-item .btn-primary,
  .purchased-item a,
  .purchased-item button {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .modal-content {
    padding: 24px 16px;
    border-radius: 20px;
    max-width: 95%;
    margin: 0 auto;
  }
  .modal-tabs {
    gap: 12px;
    margin-bottom: 20px;
  }
}

/* Header optimization on mobile devices */
@media (max-width: 600px) {
  .nav-username,
  .nav-logout-btn {
    display: none !important;
  }
  .navbar .nav-right {
    gap: 8px !important;
  }
}

@media (max-width: 380px) {
  .logo-text {
    display: none !important;
  }
}

/* Other notes from seller card hover styling */
.other-note-card {
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), background-color var(--transition-smooth);
}
.other-note-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-black) !important;
  box-shadow: var(--shadow-md);
  background-color: var(--bg-primary) !important;
}

/* Onboarding tutorial animations */
.tutorial-slide {
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.tutorial-slide.active {
  opacity: 1;
  transform: translateY(0);
}
.tutorial-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-light);
  transition: background-color var(--transition-smooth), transform var(--transition-smooth);
}
.tutorial-dot.active {
  background-color: var(--accent-black);
  transform: scale(1.25);
}

/* Autocomplete suggestions dropdown styles */
.search-container {
  position: relative;
}
.search-suggestions-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  max-height: 280px;
  overflow-y: auto;
  z-index: 9999;
  padding: 6px 0;
}
.suggestion-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  cursor: pointer;
  transition: background-color 0.2s;
  text-align: left;
  gap: 12px;
}
.suggestion-item:hover {
  background-color: var(--bg-secondary);
}
.suggestion-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.suggestion-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.suggestion-sub {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.suggestion-price {
  font-size: 13px;
  font-weight: 800;
  color: #10b981;
  flex-shrink: 0;
}