/* ==========================================================================
   サイトメイト - style.css
   ========================================================================== */

:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #3730a3;
  --color-primary-light: #6366f1;
  --color-accent: #14b8a6;
  --color-accent-dark: #0f9c8c;
  --color-warn: #ff9f45;
  --color-text: #1f2333;
  --color-text-sub: #62677d;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f6ff;
  --color-border: #e6e8f5;
  --header-height: 72px;
  --max-width: 1160px;
  --radius: 16px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
    "Meiryo", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.demo-notice {
  background: #fff3cd;
  color: #7a5c00;
  text-align: center;
  font-size: 12px;
  padding: 6px 10px;
  border-bottom: 1px solid #f0d98c;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--color-primary-dark);
  letter-spacing: 0.01em;
}

.logo .logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.global-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.global-nav a {
  display: inline-block;
  padding: 10px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  border-radius: 999px;
  transition: color var(--transition), background var(--transition);
}

.global-nav a:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 999px;
  border: 2px solid var(--color-primary);
  transition: background var(--transition), color var(--transition),
    transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 8px 20px rgba(20, 184, 166, 0.3);
}

.btn-accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
}

/* Hamburger */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  z-index: 1100;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 8px;
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  transition: transform var(--transition), opacity var(--transition), top var(--transition);
}

.nav-toggle span {
  top: 19px;
}

.nav-toggle span::before {
  top: -8px;
}

.nav-toggle span::after {
  top: 8px;
}

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--color-primary-dark);
}

.nav-toggle.is-open span::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--color-primary-dark);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 90px;
  background: radial-gradient(circle at 15% 20%, #eef0ff 0%, #ffffff 45%),
    radial-gradient(circle at 90% 10%, #e6fbf7 0%, transparent 40%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eef0ff;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(28px, 4.2vw, 46px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 18px;
}

.hero h1 .accent {
  color: var(--color-primary);
}

.hero p.lead {
  font-size: clamp(14px, 1.6vw, 16px);
  color: var(--color-text-sub);
  max-width: 520px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.hero-note {
  font-size: 12px;
  color: var(--color-text-sub);
}

.hero-visual {
  position: relative;
  width: 100%;
}

.hero-photo {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 0 30px 60px rgba(55, 48, 163, 0.18);
  border: 1px solid var(--color-border);
}

.float-chip {
  position: absolute;
  background: #fff;
  border-radius: 12px;
  padding: 10px 16px;
  box-shadow: 0 12px 26px rgba(31, 35, 51, 0.12);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  max-width: calc(100% - 20px);
}

.float-chip.chip-1 {
  top: -18px;
  right: 10px;
  color: var(--color-accent-dark);
}

.float-chip.chip-2 {
  bottom: -16px;
  left: -16px;
  color: var(--color-primary);
}

/* ---------- Section generic ---------- */
.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  text-align: center;
  margin-bottom: 52px;
}

.section-head .en {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-primary);
  font-weight: 800;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  color: var(--color-text);
}

.section-head p {
  margin-top: 14px;
  color: var(--color-text-sub);
  font-size: 14px;
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Pain points ---------- */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.pain-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.pain-card:hover {
  box-shadow: 0 14px 30px rgba(79, 70, 229, 0.1);
  transform: translateY(-4px);
}

.pain-card .icon {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.pain-card h3 {
  font-size: 15px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.pain-card p {
  font-size: 13px;
  color: var(--color-text-sub);
}

/* ---------- Concept split ---------- */
.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.concept-grid .visual {
  border-radius: var(--radius);
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  position: relative;
  overflow: hidden;
}

.concept-grid .visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.concept-list li {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
}

.concept-list .num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.concept-list h4 {
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--color-text);
}

.concept-list p {
  font-size: 13px;
  color: var(--color-text-sub);
}

/* ---------- AI band ---------- */
.ai-band {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary) 60%, var(--color-accent-dark));
  color: #fff;
  border-radius: 24px;
  padding: 56px 40px;
  text-align: center;
}

.ai-band .en {
  color: rgba(255, 255, 255, 0.7);
}

.ai-band h2 {
  color: #fff;
}

.ai-band p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 14px auto 30px;
  font-size: 14px;
}

.ai-chips {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.ai-chips span {
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

/* ---------- Pricing ---------- */
.price-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price-grid-2 {
  grid-template-columns: repeat(2, 1fr);
  max-width: 720px;
  margin: 0 auto;
}

.price-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.price-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(79, 70, 229, 0.12);
}

.price-card.is-featured {
  border: 2px solid var(--color-primary);
  box-shadow: 0 24px 50px rgba(79, 70, 229, 0.18);
}

.price-card .badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  white-space: nowrap;
}

.price-card .plan-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.price-card .plan-desc {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 18px;
}

.price-card .price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 4px;
}

.price-card .price .amount {
  font-size: 34px;
  font-weight: 800;
  color: var(--color-text);
}

.price-card .price .unit {
  font-size: 13px;
  color: var(--color-text-sub);
}

.price-card .price-note {
  font-size: 11px;
  color: var(--color-text-sub);
  margin-bottom: 22px;
}

.price-card .plan-features {
  flex: 1;
  margin-bottom: 24px;
}

.price-card .plan-features li {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text);
  margin-bottom: 12px;
  align-items: flex-start;
}

.price-card .plan-features svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent-dark);
  flex-shrink: 0;
  margin-top: 3px;
}

.price-foot-note {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-sub);
  margin-top: 30px;
}

/* ---------- Options ---------- */
.option-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.option-table th,
.option-table td {
  text-align: left;
  padding: 16px 22px;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
}

.option-table th {
  background: var(--color-bg-alt);
  color: var(--color-text-sub);
  font-weight: 600;
  width: 220px;
}

.option-table tr:last-child td,
.option-table tr:last-child th {
  border-bottom: none;
}

/* ---------- Flow ---------- */
.flow-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.flow-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  position: relative;
}

.flow-card .step-num {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}

.flow-card h3 {
  font-size: 13px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.flow-card p {
  font-size: 11px;
  color: var(--color-text-sub);
}

/* ---------- Case studies ---------- */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.case-card .thumb {
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  overflow: hidden;
}

.case-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.case-thumb-1 { background: linear-gradient(135deg, #6366f1, #14b8a6); }
.case-thumb-2 { background: linear-gradient(135deg, #4f46e5, #ff9f45); }
.case-thumb-3 { background: linear-gradient(135deg, #0f9c8c, #6366f1); }
.case-thumb-4 { background: linear-gradient(135deg, #6b4a2f, #7a9e7e); }
.case-thumb-5 { background: linear-gradient(135deg, #2f8f8a, #14b8a6); }
.case-thumb-6 { background: linear-gradient(135deg, #b98ac9, #f6c9d6); }

.case-card .body {
  padding: 22px;
}

.case-card .tag {
  font-size: 11px;
  color: var(--color-primary);
  font-weight: 700;
}

.case-card h3 {
  font-size: 15px;
  margin: 6px 0 10px;
  color: var(--color-text);
}

.case-card p {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 14px;
}

.case-card .metric {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  background: var(--color-bg-alt);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-dark);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 22px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-a {
  padding: 0 22px 20px;
  font-size: 13px;
  color: var(--color-text-sub);
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 64px 0;
  text-align: center;
  border-radius: 24px;
}

.cta-band h2 {
  font-size: clamp(20px, 3vw, 28px);
  margin-bottom: 12px;
}

.cta-band p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 26px;
}

.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-band .btn-outline {
  border-color: #fff;
  color: #fff;
}

.cta-band .btn-outline:hover {
  background: #fff;
  color: var(--color-primary-dark);
}

/* ---------- Contact ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  height: fit-content;
}

.contact-info-card h3 {
  color: var(--color-text);
  margin-bottom: 16px;
  font-size: 17px;
}

.contact-info-card .big-tel {
  font-size: 26px;
  font-weight: 800;
  color: var(--color-primary-dark);
  margin: 10px 0 4px;
}

.contact-info-card .hours {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group label .required {
  color: #d64545;
  font-size: 11px;
  margin-left: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-note {
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}

.form-success {
  display: none;
  background: #e7f9f4;
  border: 1px solid #b9e9db;
  color: #0f6b57;
  padding: 18px 20px;
  border-radius: 10px;
  font-size: 13px;
  margin-bottom: 20px;
}

.form-success.is-visible {
  display: block;
}

/* ---------- Stripe placeholder toast ---------- */
.stripe-toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: var(--color-text);
  color: #fff;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 2000;
  max-width: 90vw;
  text-align: center;
}

.stripe-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- Footer ---------- */
.site-footer {
  background: #171933;
  color: rgba(255, 255, 255, 0.75);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 12px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col h4 {
  font-size: 13px;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition);
}

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

.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
    max-width: 420px;
    margin: 0 auto;
  }

  .float-chip {
    font-size: 11px;
    padding: 7px 10px;
  }

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

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

  .concept-grid .visual {
    order: -1;
  }

  .price-grid,
  .price-grid-2 {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

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

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

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

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

@media (max-width: 760px) {
  .global-nav,
  .header-cta .btn-outline {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .global-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
  }

  .global-nav.is-open {
    display: flex;
    transform: translateX(0);
  }

  .global-nav a {
    padding: 16px 8px;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    font-size: 15px;
  }

  .global-nav .nav-cta {
    margin-top: 20px;
  }

  .section {
    padding: 60px 0;
  }

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

  .ai-band {
    padding: 40px 22px;
    border-radius: 16px;
  }

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

  .option-table th {
    width: 130px;
    font-size: 12px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .cta-band {
    border-radius: 16px;
    padding: 44px 20px;
  }
}