/*
 * LocalSEO.com.hk - 香港本地SEO服務
 * Main Stylesheet
 */

/* CSS Reset & Variables */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary-color: #0891b2;
  --accent-color: #f59e0b;
  --text-dark: #1f2937;
  --text-medium: #4b5563;
  --text-light: #6b7280;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --error-color: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", "微軟正黑體", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--bg-light);
}

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

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

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

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-medium);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  gap: 8px;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
}

.btn-accent {
  background: var(--accent-color);
  color: white;
}

.btn-accent:hover {
  background: #d97706;
  color: white;
}

/* Header & Navigation */
.header {
  background: var(--bg-white);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 5px;
  list-style: none;
}

.nav-menu a {
  display: block;
  padding: 10px 18px;
  color: var(--text-medium);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background: var(--bg-light);
  color: var(--primary-color);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* Breadcrumb */
.breadcrumb {
  padding: 15px 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  font-size: 0.9rem;
}

.breadcrumb-list li::after {
  content: "›";
  margin-left: 10px;
  color: var(--text-light);
}

.breadcrumb-list li:last-child::after {
  content: "";
}

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

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

.breadcrumb-list .current {
  color: var(--text-dark);
  font-weight: 500;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  font-size: 3rem;
  color: white;
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.hero .btn-primary {
  background: white;
  color: var(--primary-color);
}

.hero .btn-primary:hover {
  background: var(--bg-light);
}

.hero .btn-secondary {
  border-color: white;
  color: white;
  background: transparent;
}

.hero .btn-secondary:hover {
  background: white;
  color: var(--primary-color);
}

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

.section-light {
  background: var(--bg-white);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-title p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: white;
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  font-size: 0.95rem;
}

/* Service Cards */
.service-card {
  text-align: center;
}

.service-card .card-icon {
  margin: 0 auto 20px;
}

/* Feature List */
.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

.feature-item {
  display: flex;
  gap: 15px;
  padding: 20px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.feature-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.25rem;
}

.feature-content h4 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.feature-content p {
  font-size: 0.9rem;
  margin: 0;
}

/* Tools Section */
.tool-box {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
}

.tool-header {
  text-align: center;
  margin-bottom: 30px;
}

.tool-form {
  max-width: 600px;
  margin: 0 auto;
}

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

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

.form-control {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.tool-result {
  margin-top: 30px;
  padding: 25px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  display: none;
}

.tool-result.show {
  display: block;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

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

.result-label {
  font-weight: 500;
  color: var(--text-dark);
}

.result-value {
  font-weight: 600;
}

.result-good { color: var(--success-color); }
.result-warning { color: var(--accent-color); }
.result-bad { color: var(--error-color); }

/* Score Display */
.score-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-weight: bold;
}

.score-circle.good {
  background: linear-gradient(135deg, #10b981, #34d399);
  color: white;
}

.score-circle.warning {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: white;
}

.score-circle.bad {
  background: linear-gradient(135deg, #ef4444, #f87171);
  color: white;
}

.score-number {
  font-size: 2.5rem;
  line-height: 1;
}

.score-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

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

.faq-item {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  margin-bottom: 15px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.faq-question {
  padding: 20px 25px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  background: var(--bg-light);
}

.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  color: var(--primary-color);
  transition: var(--transition);
}

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

.faq-answer {
  padding: 0 25px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 25px 25px;
  max-height: 500px;
}

/* Blog Cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.blog-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.blog-card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
}

.blog-card-content {
  padding: 25px;
}

.blog-card-meta {
  display: flex;
  gap: 15px;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 12px;
}

.blog-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-card h3 a {
  color: var(--text-dark);
}

.blog-card h3 a:hover {
  color: var(--primary-color);
}

.blog-card p {
  font-size: 0.95rem;
  color: var(--text-medium);
  margin-bottom: 15px;
}

.read-more {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.read-more::after {
  content: "→";
  transition: var(--transition);
}

.read-more:hover::after {
  transform: translateX(5px);
}

/* Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-item {
  padding: 30px;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-medium);
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.2rem;
  margin-bottom: 2rem;
}

.cta-section .btn-primary {
  background: white;
  color: var(--primary-color);
}

.cta-section .btn-primary:hover {
  background: var(--bg-light);
}

/* SEO Description Section */
.seo-description {
  background: var(--bg-light);
  padding: 60px 0;
  border-top: 1px solid var(--border-color);
}

.seo-description-content {
  max-width: 900px;
  margin: 0 auto;
}

.seo-description h2 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

.seo-description p {
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: white;
  padding: 60px 0 30px;
}

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

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 15px;
  font-size: 0.95rem;
}

.footer h4 {
  color: white;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

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

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
  font-size: 0.9rem;
}

.footer-bottom-links {
  display: flex;
  gap: 25px;
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-bottom-links a:hover {
  color: white;
}

/* Blog Post Page */
.blog-post {
  padding: 60px 0;
}

.blog-post-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

.blog-post-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.blog-post-meta {
  display: flex;
  justify-content: center;
  gap: 20px;
  color: var(--text-light);
  font-size: 0.95rem;
}

.blog-post-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-white);
  padding: 50px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.blog-post-content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.blog-post-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.blog-post-content p {
  margin-bottom: 1.25rem;
}

.blog-post-content ul,
.blog-post-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.blog-post-content li {
  margin-bottom: 0.5rem;
  color: var(--text-medium);
}

.blog-post-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 20px;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-medium);
}

.blog-cta {
  background: var(--bg-light);
  padding: 30px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin-top: 40px;
}

.blog-cta h3 {
  margin-bottom: 0.5rem;
}

.blog-cta p {
  margin-bottom: 1rem;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 50px 0;
  text-align: center;
}

.page-header h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Contact Form */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info-item {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-info-content h4 {
  margin-bottom: 0.25rem;
}

.contact-info-content p {
  margin: 0;
  font-size: 0.95rem;
}

.contact-form {
  background: var(--bg-white);
  padding: 40px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* About Page */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-image {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  height: 400px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: white;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.team-member {
  text-align: center;
  padding: 30px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.team-member-avatar {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: white;
}

.team-member h4 {
  margin-bottom: 0.25rem;
}

.team-member p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin: 0;
}

/* Legal Pages */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--bg-white);
  padding: 50px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
}

.legal-content h2 {
  margin-top: 2rem;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.legal-content h3 {
  margin-top: 1.5rem;
  font-size: 1.2rem;
}

/* User Guide Section */
.user-guide {
  background: var(--bg-light);
  padding: 50px 0;
}

.user-guide-content {
  max-width: 900px;
  margin: 0 auto;
}

.user-guide h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.user-guide h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
}

/* Contextual Intro */
.contextual-intro {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(8, 145, 178, 0.05));
  padding: 40px;
  border-radius: var(--radius-xl);
  margin-bottom: 30px;
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.contextual-intro h2 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-section {
    grid-template-columns: 1fr;
  }

  .about-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 20px;
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 50px 0;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .section {
    padding: 50px 0;
  }

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

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .stat-number {
    font-size: 2rem;
  }

  .tool-box {
    padding: 25px;
  }

  .blog-post-content {
    padding: 30px 20px;
  }

  .legal-content {
    padding: 30px 20px;
  }

  .contact-form {
    padding: 25px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .btn {
    width: 100%;
  }

  .blog-card-image {
    height: 150px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.hidden { display: none; }
.visible { display: block; }