:root {
  --color-bg: #faf8f5;
  --color-ink: #20242e;
  --color-ink-soft: #5a5f6e;
  --color-primary: #2c3454;
  --color-accent: #c1ad91;
  --color-accent-soft: #f3ede2;
  --color-card: #ffffff;
  --color-border: #e7e2d8;
  --max-width: 1080px;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(44, 52, 84, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.8;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo-img {
  height: 32px;
  width: auto;
  display: block;
}

.logo-img-small {
  height: 24px;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--color-ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

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

@media (max-width: 720px) {
  .nav { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  opacity: 0.92;
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-small {
  padding: 10px 24px;
  font-size: 13px;
}

.btn-full {
  width: 100%;
}

/* Hero */
.hero {
  padding: 96px 0 80px;
  background: linear-gradient(180deg, #fdfbf8 0%, var(--color-bg) 100%);
}

.hero-inner {
  max-width: 760px;
}

.eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin: 0 0 16px;
}

.eyebrow.center {
  text-align: center;
}

.hero h1 {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.5;
  margin: 0 0 24px;
  color: var(--color-primary);
}

.hero-lead {
  font-size: 16px;
  color: var(--color-ink-soft);
  margin: 0 0 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 600px) {
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 30px; }
}

/* Section title */
.section-title {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-primary);
  margin: 0 0 48px;
}

.section-title.center {
  text-align: center;
}

/* Problems */
.problems {
  padding: 72px 0;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 720px) {
  .problem-grid { grid-template-columns: 1fr; }
}

.problem-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  font-weight: 500;
}

.problem-card p {
  margin: 0;
}

/* Features */
.features {
  padding: 72px 0;
  background: var(--color-card);
}

.feature-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-number {
  font-family: "Cormorant Garamond", serif;
  font-size: 56px;
  font-weight: 700;
  color: var(--color-accent-soft);
  line-height: 1;
}

.feature-body h3 {
  margin: 0 0 12px;
  font-size: 20px;
  color: var(--color-primary);
}

.feature-body p {
  margin: 0;
  color: var(--color-ink-soft);
}

@media (max-width: 600px) {
  .feature-row { grid-template-columns: 1fr; gap: 8px; }
  .feature-number { font-size: 36px; }
}

/* Flow */
.flow {
  padding: 72px 0;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

@media (max-width: 860px) {
  .flow-grid { grid-template-columns: 1fr; }
}

.flow-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
}

.flow-step {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 16px;
}

.flow-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--color-primary);
}

.flow-card p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.notice {
  background: var(--color-accent-soft);
  border-radius: var(--radius);
  padding: 20px 28px;
}

.notice p {
  margin: 0;
  font-size: 13px;
  color: var(--color-ink-soft);
}

/* FAQ */
.faq {
  padding: 72px 0;
  background: var(--color-card);
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-primary);
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--color-accent);
  font-weight: 700;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 16px 0 0;
  color: var(--color-ink-soft);
  font-size: 14px;
}

/* Contact */
.contact {
  padding: 72px 0 96px;
}

.contact-lead {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 40px;
  color: var(--color-ink-soft);
}

.contact-form {
  max-width: 560px;
  margin: 0 auto;
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-row label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.required {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--color-accent);
  border-radius: 4px;
  padding: 2px 8px;
  margin-left: 6px;
  vertical-align: middle;
}

.form-row input,
.form-row textarea {
  font-family: inherit;
  font-size: 15px;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-ink);
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

@media (max-width: 600px) {
  .contact-form { padding: 28px 20px; }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-inner p {
  margin: 0;
  font-size: 13px;
  color: var(--color-ink-soft);
}