/* ============================================
   九色调色板与视觉素材库 - 核心样式表
   光谱渐变+极致留白 现代设计工具视觉
   ============================================ */

/* CSS Variables */
:root {
  --bg-white: #FFFFFF;
  --neutral-gray: #F8F9FA;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-muted: #6C757D;
  --card-bg: #FFFFFF;
  --border-light: #E9ECEF;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-cool: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-sunset: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --gradient-ocean: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
  --font-display: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-white);
  line-height: 1.8;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul, ol {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
p { margin-bottom: 1rem; color: var(--text-secondary); }

/* Container */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-wide {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Navigation ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-menu a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ============ Hero Section ============ */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-gradient-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(240, 147, 251, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 80%, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
  animation: heroGradientShift 12s ease-in-out infinite alternate;
}

@keyframes heroGradientShift {
  0% { opacity: 1; transform: scale(1); }
  100% { opacity: 0.8; transform: scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hero-content h1 {
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Upload Drop Zone */
.upload-zone {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
  cursor: pointer;
  max-width: 560px;
  margin: 0 auto;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: #667eea;
  background: rgba(102, 126, 234, 0.04);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.upload-zone-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-zone-icon svg {
  width: 28px;
  height: 28px;
  fill: white;
}

.upload-zone h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.upload-zone p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ============ Bento Grid ============ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 20px 0;
}

.bento-item {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: 28px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.bento-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.bento-item.span-2 {
  grid-column: span 2;
}

.bento-item.span-3 {
  grid-column: span 3;
}

.bento-item.span-full {
  grid-column: 1 / -1;
}

.bento-item.row-2 {
  grid-row: span 2;
}

/* ============ Section Styles ============ */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============ Color Palette Cards ============ */
.palette-strip {
  display: flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 80px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.palette-strip:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.palette-color {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  cursor: pointer;
  position: relative;
}

.palette-color span {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.palette-color:hover span {
  opacity: 1;
}

/* Daily Color Card */
.daily-palette {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.daily-color-block {
  width: 120px;
  height: 140px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 12px;
  cursor: pointer;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.daily-color-block:hover {
  transform: translateY(-6px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.daily-color-block .hex-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: white;
  text-shadow: 0 1px 3px rgba(0,0,0,0.4);
  background: rgba(0,0,0,0.2);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ============ Gradient Cards ============ */
.gradient-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.gradient-card {
  height: 140px;
  border-radius: var(--radius-md);
  position: relative;
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition-normal);
}

.gradient-card:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

.gradient-card::after {
  content: attr(data-css);
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px;
  background: linear-gradient(transparent, rgba(0,0,0,0.6));
  color: white;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.gradient-card:hover::after {
  opacity: 1;
}

/* ============ Texture Gallery ============ */
.texture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.texture-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition-normal);
}

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

.texture-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.texture-card-info {
  padding: 16px;
}

.texture-card-info h4 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.texture-card-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ============ Color Tool Panel ============ */
.color-tool-panel {
  background: var(--neutral-gray);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.color-wheel-container {
  width: 240px;
  height: 240px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: conic-gradient(
    hsl(0, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(360, 100%, 50%)
  );
  position: relative;
  cursor: crosshair;
  box-shadow: var(--shadow-md);
}

.color-wheel-container::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40%;
  height: 40%;
  border-radius: 50%;
  background: white;
}

/* Contrast Checker */
.contrast-checker {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
}

.contrast-preview {
  padding: 24px;
  border-radius: var(--radius-md);
  text-align: center;
}

.contrast-result {
  text-align: center;
}

.contrast-ratio {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.contrast-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 8px;
}

.contrast-badge.pass {
  background: #d4edda;
  color: #155724;
}

.contrast-badge.fail {
  background: #f8d7da;
  color: #721c24;
}

/* ============ Blog Cards ============ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.blog-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition-normal);
  display: block;
}

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

.blog-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.blog-card-body {
  padding: 24px;
}

.blog-card-body h4 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.blog-card-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.blog-card-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border-light);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: #667eea;
  color: #667eea;
}

.btn-ghost {
  background: var(--neutral-gray);
  color: var(--text-primary);
}

.btn-ghost:hover {
  background: #e9ecef;
}

/* ============ Toast Notification ============ */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  z-index: 9999;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ============ Ripple Effect ============ */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple-wave {
  position: absolute;
  border-radius: 50%;
  background: rgba(102, 126, 234, 0.3);
  transform: scale(0);
  animation: rippleAnim 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ============ Aura Cursor Effect ============ */
.cursor-aura {
  position: fixed;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* ============ Footer ============ */
.site-footer {
  background: var(--neutral-gray);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 12px;
}

.footer-links h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 4px 0;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============ Breadcrumb ============ */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
}

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

.breadcrumb span {
  margin: 0 8px;
}

/* ============ Page Header ============ */
.page-header {
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 30% 50%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(240, 147, 251, 0.06) 0%, transparent 50%);
}

.page-header h1 {
  position: relative;
  margin-bottom: 16px;
}

.page-header p {
  position: relative;
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ============ Content Area ============ */
.content-area {
  padding: 40px 0 80px;
}

.content-area h2 {
  margin-top: 40px;
  margin-bottom: 16px;
}

.content-area h3 {
  margin-top: 32px;
  margin-bottom: 12px;
}

.content-area p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.content-area ul, .content-area ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.content-area li {
  margin-bottom: 8px;
  line-height: 1.8;
  list-style: disc;
}

/* ============ FAQ Section ============ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 20px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition-fast);
}

.faq-question:hover {
  background: var(--neutral-gray);
}

.faq-question::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  padding: 0 24px 20px;
  max-height: 500px;
}

/* ============ Search Page ============ */
.search-container {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 0;
}

.search-input-wrapper {
  position: relative;
  margin-bottom: 32px;
}

.search-input {
  width: 100%;
  padding: 16px 24px 16px 52px;
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: 1.05rem;
  font-family: var(--font-body);
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input:focus {
  border-color: #667eea;
}

.search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-results {
  list-style: none;
}

.search-result-item {
  padding: 20px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--border-light);
  transition: var(--transition-fast);
}

.search-result-item:hover {
  background: var(--neutral-gray);
}

.search-result-item h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.search-result-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* ============ 404 Page ============ */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.error-code {
  font-size: clamp(6rem, 15vw, 12rem);
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

/* ============ App Download Page ============ */
.app-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 120px 0 80px;
}

.app-badges {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--text-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-normal);
}

.app-badge:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============ Tags ============ */
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--neutral-gray);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin: 4px;
  transition: var(--transition-fast);
}

.tag:hover {
  background: #e9ecef;
  color: var(--text-primary);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .bento-item.span-3 {
    grid-column: span 2;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .app-hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
  }
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-toggle {
    display: flex;
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-item.span-2,
  .bento-item.span-3 {
    grid-column: span 1;
  }
  .hero-section {
    min-height: auto;
    padding: 120px 24px 60px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  .contrast-checker {
    grid-template-columns: 1fr;
  }
  .daily-color-block {
    width: 80px;
    height: 100px;
  }
  .section {
    padding: 48px 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .upload-zone {
    padding: 32px 20px;
  }
  .gradient-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============ Utility Classes ============ */
.text-center { text-align: center; }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}