:root {
  --bg: #F6F5F0;
  --text-primary: #28251F;
  --text-secondary: #5F5B54;
  --accent: #5A7A8B;
  --accent-light: #B8C9D8;
  --sage: #7A8B7A;
  --card-bg: #FFFFFF;
  --border: #E4E1D7;
  --shadow: 0 8px 26px rgba(40, 37, 31, 0.04);
  --shadow-hover: 0 14px 41px rgba(40, 37, 31, 0.07);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: #3A5A6B;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

/* Header / Nav */
nav {
  position: sticky;
  top: 0;
  background: rgba(246, 245, 240, 0.96);
  backdrop-filter: blur(12px);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}

.logo {
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  font-size: 14.5px;
  font-weight: 400;
}

.nav-links a {
  color: var(--text-secondary);
}

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

/* Hero */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 80px 0 60px;
  position: relative;
}

.hero-content {
  max-width: 620px;
}

.hero h1 {
  font-size: 62px;
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: -0.04em;
  margin-bottom: 28px;
}

.hero p {
  font-size: 21px;
  color: var(--text-secondary);
  max-width: 460px;
  margin-bottom: 42px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 32px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 14px rgba(90, 122, 139, 0.25);
}

.btn-primary:hover {
  background: #3A5A6B;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(90, 122, 139, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 15px 28px;
}

.btn-secondary:hover {
  background: var(--card-bg);
  border-color: var(--accent-light);
}

/* Sections */
section {
  padding: 92px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: 38px;
  font-weight: 500;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
}

.section-header p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto;
}

/* Guide Collection */
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.guide-card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 0;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.guide-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.card-accent {
  height: 6px;
  background: linear-gradient(90deg, var(--sage), var(--accent));
}

.card-body {
  padding: 32px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.guide-card h3 {
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 14px;
  line-height: 1.3;
}

.guide-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 24px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.price {
  font-size: 21px;
  font-weight: 500;
  color: var(--text-primary);
}

.price span {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
}

.card-btn {
  font-size: 13.5px;
  padding: 9px 18px;
  border-radius: 9999px;
  background: var(--bg);
  color: var(--accent);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

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

/* Why Digital */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.why-text h3 {
  font-size: 27px;
  margin-bottom: 18px;
  font-weight: 500;
}

.why-text p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

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

.why-list li {
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  font-size: 15.5px;
}

.why-list li::before {
  content: "→";
  color: var(--sage);
  font-weight: 500;
}

.why-visual {
  background: var(--card-bg);
  border-radius: 22px;
  padding: 42px 38px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.why-visual .note {
  font-family: Georgia, serif;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent-light);
  padding-left: 22px;
}

/* How It Works */
.how-steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 780px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  background: var(--card-bg);
  padding: 28px 32px;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.step:hover {
  border-color: var(--accent-light);
}

.step-number {
  width: 42px;
  height: 42px;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 17px;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 18px;
  margin-bottom: 6px;
  font-weight: 500;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 15px;
}

/* FAQ */
details {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

summary {
  padding: 22px 28px;
  font-weight: 500;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::after {
  content: "+";
  font-size: 22px;
  color: var(--accent);
  transition: transform 0.3s ease;
}

details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

details[open] {
  border-color: var(--accent-light);
}

.faq-answer {
  padding: 0 28px 26px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* Inquiry Form */
.inquiry-section {
  background: var(--card-bg);
  border-radius: 26px;
  padding: 64px 58px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  max-width: 720px;
  margin: 0 auto;
}

.inquiry-section h2 {
  text-align: center;
  margin-bottom: 12px;
}

.inquiry-section > p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

input, select, textarea {
  width: 100%;
  padding: 16px 20px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text-primary);
  font-family: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-light);
  box-shadow: 0 0 0 3px rgba(90, 122, 139, 0.08);
}

textarea {
  min-height: 118px;
  resize: vertical;
}

.form-note {
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 8px;
}

/* Footer */
footer {
  background: #28251F;
  color: #B8C9D8;
  padding: 68px 0 42px;
  font-size: 14px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

.footer-col h4 {
  color: #EDE8E1;
  font-size: 15px;
  margin-bottom: 18px;
  font-weight: 500;
}

.footer-col p, .footer-col a {
  color: #B8C9D8;
  line-height: 1.85;
}

.footer-col a:hover {
  color: #EDE8E1;
}

.disclaimer {
  margin-top: 52px;
  padding-top: 28px;
  border-top: 1px solid #4A463F;
  font-size: 12.5px;
  color: #9A9387;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 28px;
  padding-right: 28px;
  line-height: 1.7;
}

/* Thank You Page */
.thankyou {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.thankyou-card {
  max-width: 520px;
  text-align: center;
  background: var(--card-bg);
  padding: 68px 52px;
  border-radius: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.thankyou-card .icon {
  width: 78px;
  height: 78px;
  background: #E8F0E3;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 32px;
  font-size: 38px;
}

.thankyou-card h1 {
  font-size: 32px;
  margin-bottom: 16px;
  font-weight: 500;
}

.thankyou-card p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.8;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 46px;
  }
  
  .why-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 42px;
  }
  
  .guide-grid {
    grid-template-columns: 1fr;
  }
}