/**
 * SEO GEO - Minimal Design System
 * Clean, readable, professional
 */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #1a1a1a;
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100vw;
}

/* ========================================
   Color Variables
   ======================================== */
:root {
  /* Grayscale */
  --black: #0a0a0a;
  --gray-900: #1a1a1a;
  --gray-800: #2d2d2d;
  --gray-700: #404040;
  --gray-600: #525252;
  --gray-500: #737373;
  --gray-400: #a3a3a3;
  --gray-300: #d4d4d4;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --gray-50: #fafafa;
  --white: #ffffff;

  /* Accent (minimal use) */
  --accent: #2563eb;
  --accent-light: #3b82f6;

  /* Gradients */
  --gradient-silver: linear-gradient(135deg, #e5e5e5 0%, #f5f5f5 50%, #d4d4d4 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #404040 100%);
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--gray-900);
  margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  margin-bottom: 1rem;
  color: var(--gray-700);
}

a {
  color: var(--gray-900);
  text-decoration: none;
  transition: color 0.2s;
}

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

strong { font-weight: 600; }

small, .small { font-size: 0.875rem; }

/* ========================================
   Layout
   ======================================== */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  max-width: 100vw;
}

.page > main {
  flex: 1;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-sm {
  padding: 2rem 0;
}

.section-lg {
  padding: 6rem 0;
}

/* ========================================
   Grid System (CSS Grid based)
   ======================================== */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

.grid-3 {
  grid-template-columns: repeat(1, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 576px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 769px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Flexbox Row System (legacy support) */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: -0.5rem;
}

.row > * {
  padding: 0.5rem;
  box-sizing: border-box;
  width: 100%;
}

/* Desktop column widths */
@media (min-width: 769px) {
  .row > .col-6 { width: 50%; }
  .row > .col-4 { width: 33.333%; }
  .row > .col-3 { width: 25%; }
  .row > .col-lg-8 { width: 66.666%; }
  .row > .col-lg-6 { width: 50%; }
  .row > .col-lg-4 { width: 33.333%; }
  .row > .col-lg-3 { width: 25%; }
}

/* Row gaps - override margin-based grid */
.row.gap-1 { margin: -0.25rem; }
.row.gap-1 > * { padding: 0.25rem; }
.row.gap-2 { margin: -0.5rem; }
.row.gap-2 > * { padding: 0.5rem; }
.row.gap-3 { margin: -0.75rem; }
.row.gap-3 > * { padding: 0.75rem; }
.row.gap-4 { margin: -1rem; }
.row.gap-4 > * { padding: 1rem; }

/* Flex gaps */
.flex.gap-1 { gap: 0.5rem; }
.flex.gap-2 { gap: 1rem; }
.flex.gap-3 { gap: 1.5rem; }
.flex.gap-4 { gap: 2rem; }

/* ========================================
   Flexbox Utilities
   ======================================== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

/* ========================================
   Spacing
   ======================================== */
.m-0 { margin: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.my-2 { margin-top: 1rem; margin-bottom: 1rem; }
.my-3 { margin-top: 1.5rem; margin-bottom: 1.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.px-2 { padding-left: 1rem; padding-right: 1rem; }
.px-3 { padding-left: 1.5rem; padding-right: 1.5rem; }

/* ========================================
   Text Utilities
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.text-white { color: var(--white); }
.text-gray { color: var(--gray-500); }
.text-dark { color: var(--gray-900); }
.text-accent { color: var(--accent); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.05em; }

/* ========================================
   Background Utilities
   ======================================== */
.bg-white { background-color: var(--white); }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-dark { background-color: var(--gray-900); }
.bg-black { background-color: var(--black); }

/* ========================================
   Display Utilities
   ======================================== */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
  .show-desktop { display: block !important; }
}

/* ========================================
   Width Utilities
   ======================================== */
.w-full { width: 100%; }
.max-w-sm { max-width: 400px; }
.max-w-md { max-width: 600px; }
.max-w-lg { max-width: 800px; }
.max-w-xl { max-width: 1000px; }

/* ========================================
   Navigation
   ======================================== */
.navbar {
  background: var(--black);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--white);
  font-weight: 600;
  font-size: 1.125rem;
}

.navbar-brand img {
  height: 32px;
  width: auto;
}

.navbar-brand:hover {
  color: var(--white);
}

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

.nav-link {
  color: var(--gray-300);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 4px;
  transition: all 0.2s;
}

.nav-link:hover {
  color: var(--white);
  background: rgba(255,255,255,0.1);
}

.nav-link.active {
  color: var(--white);
  background: var(--accent);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  gap: 0.5rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gray-900);
  color: var(--white);
  border-color: var(--gray-900);
}

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

.btn-secondary {
  background: var(--white);
  color: var(--gray-900);
  border-color: var(--gray-300);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
  color: var(--gray-900);
}

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

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

.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border-color: var(--gray-300);
}

.btn-outline:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  border-color: var(--gray-400);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  background: var(--gradient-dark);
  color: var(--white);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  color: var(--white);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  color: var(--gray-300);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

@media (min-width: 769px) {
  .hero h1 {
    font-size: 3rem;
  }
}

/* ========================================
   Badges
   ======================================== */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-dark {
  background: var(--gray-900);
  color: var(--white);
}

.badge-light {
  background: var(--gray-200);
  color: var(--gray-700);
}

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

/* ========================================
   Cards
   ======================================== */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.card-header {
  background: var(--gray-900);
  color: var(--white);
  padding: 1rem 1.5rem;
  font-weight: 500;
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
}

/* Feature Card */
.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 2rem;
  height: 100%;
  transition: all 0.2s;
}

.feature-card:hover {
  border-color: var(--gray-300);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--gray-100);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--gray-700);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--gray-900);
}

.feature-text {
  font-size: 0.9375rem;
  color: var(--gray-600);
  margin: 0;
}

/* Chapter Card */
.chapter-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
  height: 100%;
}

.chapter-card:hover {
  border-color: var(--gray-300);
}

.chapter-header {
  background: var(--gray-900);
  color: var(--white);
  padding: 0.875rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chapter-body {
  padding: 1.25rem;
}

.chapter-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--gray-900);
}

.chapter-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.chapter-list li {
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chapter-list li:last-child {
  border-bottom: none;
}

.chapter-list li::before {
  content: '\2192';
  color: var(--gray-400);
}

/* ========================================
   Stats
   ======================================== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 576px) {
  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  text-align: center;
  padding: 1rem 0.5rem;
  background: var(--white);
  border-radius: 8px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}

@media (min-width: 769px) {
  .stat-number {
    font-size: 2.5rem;
  }
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--gray-600);
  line-height: 1.4;
}

/* ========================================
   Info Box
   ======================================== */
.info-box {
  background: var(--gray-50);
  border-left: 3px solid var(--gray-900);
  padding: 1.5rem;
  border-radius: 0 6px 6px 0;
}

.info-box-title {
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
  font-size: 0.9375rem;
}

.info-box p {
  margin: 0;
  color: var(--gray-600);
}

/* ========================================
   Table
   ======================================== */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  background: var(--gray-900);
  color: var(--white);
  font-weight: 500;
  font-size: 0.875rem;
}

.table td {
  font-size: 0.9375rem;
  color: var(--gray-700);
}

.table tbody tr:hover {
  background: var(--gray-50);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ========================================
   Accordion
   ======================================== */
.accordion {
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--gray-200);
}

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

.accordion-header {
  margin: 0;
}

.accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--gray-900);
  background: var(--white);
  border: none;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s;
}

.accordion-btn:hover {
  background: var(--gray-50);
}

.accordion-btn::after {
  content: '+';
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--gray-500);
  transition: transform 0.2s;
}

.accordion-btn.active {
  background: var(--gray-50);
}

.accordion-btn.active::after {
  content: '-';
}

.accordion-content {
  display: none;
  padding: 1rem 1.25rem;
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  color: var(--gray-600);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.accordion-content.show {
  display: block;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.form-label .required {
  color: #dc2626;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--gray-900);
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gray-900);
  box-shadow: 0 0 0 3px rgba(0,0,0,0.05);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23525252' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

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

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Alerts
   ======================================== */
.alert {
  padding: 1rem 1.25rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.alert-success {
  background: #f0fdf4;
  border: 1px solid #86efac;
  color: #166534;
}

.alert-error {
  background: #fef2f2;
  border: 1px solid #fca5a5;
  color: #991b1b;
}

.alert.hidden {
  display: none;
}

/* ========================================
   Contact Form
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 769px) {
  .contact-grid {
    grid-template-columns: 3fr 2fr;
  }
}

.contact-main {
  width: 100%;
}

.contact-side {
  width: 100%;
}

.contact-form-wrapper {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 2rem;
}

@media (max-width: 768px) {
  .contact-form-wrapper {
    padding: 1.5rem;
  }
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
  background: var(--gray-900);
  color: var(--white);
  padding: 4rem 0;
  text-align: center;
}

.cta h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta p {
  color: var(--gray-400);
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--black);
  color: var(--gray-300);
  padding: 3rem 0 1.5rem;
}

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

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.footer-brand img {
  height: 28px;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--gray-400);
}

.footer-title {
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.875rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-700);
  text-align: center;
}

.footer-company {
  font-size: 0.6875rem;
  color: var(--gray-400);
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

.footer-links-inline {
  font-size: 0.8125rem;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.footer-links-inline a {
  color: var(--gray-300);
  transition: color 0.2s;
}

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

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--gray-400);
}

/* ========================================
   404 Page
   ======================================== */
.error-page {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1.5rem;
}

.error-code {
  font-size: 6rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1;
  margin-bottom: 1rem;
}

.error-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.error-text {
  color: var(--gray-500);
  margin-bottom: 2rem;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  max-width: 500px;
  margin: 2rem auto 0;
}

@media (max-width: 480px) {
  .error-links {
    grid-template-columns: 1fr;
  }
}

.error-link {
  display: block;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: 6px;
  color: var(--gray-900);
  transition: all 0.2s;
}

.error-link:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.error-link strong {
  display: block;
  margin-bottom: 0.25rem;
}

.error-link span {
  font-size: 0.8125rem;
  color: var(--gray-500);
}

/* ========================================
   Spinner
   ======================================== */
.spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

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

/* ========================================
   Utilities
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.rounded { border-radius: 6px; }
.rounded-lg { border-radius: 12px; }

.shadow-sm { box-shadow: 0 1px 2px rgba(0,0,0,0.05); }
.shadow { box-shadow: 0 4px 6px rgba(0,0,0,0.07); }
.shadow-lg { box-shadow: 0 10px 15px rgba(0,0,0,0.1); }

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

/* Section Title */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--gray-500);
  font-size: 1rem;
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
  .navbar,
  .footer,
  .btn {
    display: none !important;
  }
}