:root {
  --ink: #18201f;
  --muted: #5b6662;
  --paper: #f7f5ee;
  --white: #ffffff;
  --teal: #0f766e;
  --teal-dark: #0a4f49;
  --red: #d4492e;
  --gold: #d8a83f;
  --line: rgba(24, 32, 31, 0.14);
  --shadow: 0 22px 60px rgba(24, 32, 31, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(15, 118, 110, 0.05) 1px, transparent 1px),
    var(--paper);
  background-size: 42px 42px;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  color: var(--white);
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(247, 245, 238, 0.93);
  box-shadow: 0 8px 28px rgba(24, 32, 31, 0.12);
  backdrop-filter: blur(14px);
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
  font-size: 12px;
}

.site-nav {
  gap: clamp(14px, 2.5vw, 30px);
  font-size: 14px;
  font-weight: 700;
}

.nav-cta {
  padding: 9px 16px;
  border: 1px solid currentColor;
  border-radius: 999px;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background: url("assets/sticker-hero.png") center / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 22vh;
  background: linear-gradient(180deg, transparent, var(--paper));
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 27, 26, 0.88) 0%, rgba(9, 27, 26, 0.7) 35%, rgba(9, 27, 26, 0.14) 75%),
    linear-gradient(0deg, rgba(9, 27, 26, 0.46), rgba(9, 27, 26, 0.08));
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 132px 0 13vh;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 640px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(16px, 2vw, 19px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 12px 22px;
  border: 0;
  border-radius: 6px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: var(--white);
  background: var(--red);
  box-shadow: 0 16px 34px rgba(212, 73, 46, 0.32);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(760px, 100%);
  margin: 56px 0 0;
  background: rgba(255, 255, 255, 0.24);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.hero-stats div {
  padding: 18px;
  background: rgba(8, 28, 27, 0.52);
}

.hero-stats dt {
  font-size: 22px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 2px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.section,
.pain-band,
.contact-section {
  position: relative;
  padding: clamp(72px, 10vw, 118px) 0;
}

.section-inner {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.pain-band {
  background: var(--teal-dark);
  color: var(--white);
}

.pain-grid,
.split,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(36px, 6vw, 76px);
  align-items: start;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 40px;
}

.section-heading.compact {
  max-width: 620px;
}

.section-heading p:not(.section-kicker),
.split p,
.contact-copy p {
  color: var(--muted);
  font-size: 16px;
}

.accent-section .split p,
.contact-section .contact-copy p {
  color: rgba(255, 255, 255, 0.78);
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 18px 18px 18px 48px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 23px;
  left: 20px;
  width: 14px;
  height: 8px;
  border-left: 3px solid var(--gold);
  border-bottom: 3px solid var(--gold);
  transform: rotate(-45deg);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.product-card {
  min-height: 390px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 36px rgba(24, 32, 31, 0.08);
}

.product-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.product-card:hover img {
  transform: scale(1.04);
}

.product-body {
  padding: 22px;
}

.icon-chip {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--white);
  background: var(--teal);
  border-radius: 50%;
  font-weight: 900;
}

.product-card h3,
.flow-list h3 {
  margin: 18px 0 10px;
  font-size: 21px;
  line-height: 1.3;
}

.product-card p,
.flow-list p,
.faq-list p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.accent-section,
.contact-section {
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(216, 168, 63, 0.11), transparent 34%),
    linear-gradient(90deg, var(--teal-dark), #153331);
}

.strength-list {
  display: grid;
  gap: 14px;
}

.strength-list div {
  padding: 22px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

.strength-list strong {
  display: block;
  margin-bottom: 6px;
  font-size: 18px;
}

.strength-list span {
  color: rgba(255, 255, 255, 0.76);
}

.flow-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.flow-list li {
  min-height: 250px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.76);
}

.flow-list span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: var(--white);
  background: var(--red);
  border-radius: 50%;
  font-weight: 900;
}

.faq-section {
  background: rgba(255, 255, 255, 0.48);
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}

summary {
  padding: 18px 20px;
  font-weight: 800;
  cursor: pointer;
}

details p {
  padding: 0 20px 20px;
}

.contact-copy {
  position: sticky;
  top: 100px;
}

.contact-note {
  display: grid;
  gap: 6px;
  margin-top: 28px;
  padding: 20px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 8px;
}

.contact-note span {
  font-size: 14px;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: clamp(22px, 4vw, 34px);
  color: var(--ink);
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(24, 32, 31, 0.2);
  border-radius: 6px;
  padding: 13px 14px;
  color: var(--ink);
  background: #fbfaf6;
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(15, 118, 110, 0.2);
  border-color: var(--teal);
}

.full,
.form-status,
.full-button {
  grid-column: 1 / -1;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--red);
  font-weight: 800;
}

.form-status.is-success {
  color: var(--teal);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(18px, 4vw, 48px);
  color: rgba(255, 255, 255, 0.8);
  background: #101817;
  font-size: 14px;
}

.thanks-page {
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(216, 168, 63, 0.13), transparent 34%),
    linear-gradient(90deg, var(--teal-dark), #153331);
}

.thanks-main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.thanks-panel {
  width: min(720px, 100%);
  padding: clamp(28px, 5vw, 54px);
  background: var(--white);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.thanks-brand {
  margin-bottom: 36px;
}

.thanks-panel h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.15;
}

.thanks-panel p:not(.section-kicker) {
  margin: 18px 0 30px;
  color: var(--muted);
}

@media (max-width: 920px) {
  .site-nav a:not(.nav-cta) {
    display: none;
  }

  .hero {
    min-height: 860px;
    background-position: 63% center;
  }

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

  .product-grid,
  .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-copy {
    position: static;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand span:last-child {
    display: none;
  }

  .hero {
    min-height: 820px;
    background-position: 70% center;
  }

  .hero-inner {
    width: min(100% - 28px, 1120px);
    padding-bottom: 92px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .button,
  .hero-actions {
    width: 100%;
  }

  .hero-stats,
  .product-grid,
  .flow-list,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
  }
}