/* =========
   Base
========= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  color: #222;
  background: #fff;
  line-height: 1.8;
}

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

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

.container {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
}

.section {
  padding: 80px 0;
}

.section-soft {
  background: #f8fbfc;
}

.center {
  text-align: center;
}

.eyebrow {
  color: #53c7c4;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin: 0 0 12px;
}

h1, h2, h3 {
  line-height: 1.4;
  margin-top: 0;
  color: #111;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 18px;
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

p {
  margin-top: 0;
  margin-bottom: 1em;
}

.section-heading {
  margin-bottom: 42px;
}

.section-heading p:last-child {
  margin-bottom: 0;
}

/* =========
   Header
========= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e8eeee;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
}

.header-nav {
  display: flex;
  gap: 24px;
  font-size: 0.95rem;
  color: #444;
}

/* =========
   Hero
========= */
.hero {
  padding-top: 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text .lead {
  font-size: 1.05rem;
  color: #444;
}

.hero-image img {
  border-radius: 20px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

/* =========
   Buttons
========= */
.btn {
  display: inline-block;
  padding: 14px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s ease;
}

.btn-primary {
  background: #53c7c4;
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  border: 1px solid #53c7c4;
  color: #53c7c4;
  background: #fff;
}

.btn-secondary:hover {
  background: #f0fbfb;
}

/* =========
   Layout helpers
========= */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}

.align-center {
  align-items: center;
}

.image-block img {
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.06);
}

/* =========
   Cards
========= */
.text-card-group {
  display: grid;
  gap: 18px;
}

.text-card,
.scale-box,
.tip-box,
.message-box,
.bullet-panel {
  background: #fff;
  border: 1px solid #e6efef;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.03);
}

.text-card p,
.scale-box p,
.tip-box p,
.message-box p {
  margin-bottom: 0;
}

.bullet-panel ul {
  margin: 0 0 24px;
  padding-left: 1.2em;
}

.summary {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0px;
}

.wave-image img {
  max-width: 480px;
  margin-left: auto;
}

/* =========
   Scale list
========= */
.scale-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 20px;
}

.scale-list div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 14px;
  background: #f7fbfb;
  border-radius: 10px;
}

.scale-list dt {
  font-weight: 700;
}

.scale-list dd {
  margin: 0;
}

.note {
  color: #555;
  font-size: 0.95rem;
}

/* =========
   Compare
========= */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 30px;
}

.compare-card {
  background: #fff;
  border: 1px solid #e6efef;
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.03);
}

.compare-card img {
  border-radius: 12px;
  margin-bottom: 16px;
}

/* =========
   Watch display
========= */
.watch-display-section {
  background: #fff;
}

.watch-display-image {
  max-width: 1000px;
  margin: 0 auto;
}

.watch-display-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* =========
   CTA / Footer
========= */
.cta-section {
  background: linear-gradient(180deg, #ffffff 0%, #f3fbfb 100%);
}

.cta-text {
  color: #555;
  margin-bottom: 24px;
}

.site-footer {
  border-top: 1px solid #e8eeee;
  padding: 24px 0;
  color: #777;
  font-size: 0.9rem;
}

.footer-inner {
  text-align: center;
}

/* =========
   Responsive
========= */
@media (max-width: 900px) {
  .hero-grid,
  .two-col,
  .compare-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-text {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .wave-image img {
    max-width: 300px;
    margin: 20px auto 0;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 56px 0;
  }

  .header-inner {
    min-height: 56px;
  }

  .header-nav {
    display: none;
  }

  .container,
  .narrow {
    width: min(100% - 24px, 1100px);
  }

  .text-card,
  .scale-box,
  .tip-box,
  .message-box,
  .bullet-panel {
    padding: 18px;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
  }
}