:root {
  --color-bg: #070707;
  --color-text: #ffffff;
  --color-accent: #ff6b35;
  --color-accent-dark: #da4c1d;
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.35);
  --radius-pill: 999px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --cta-height: 56px;
}

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

html,
body {
  margin: 0;
  background: var(--color-bg);
}

body {
  width: 100%;
  min-height: 100vh;
  max-width: 480px;
  margin: 0 auto;
  color: var(--color-text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.02em;
  padding-bottom: calc(var(--cta-height) + var(--spacing-xl));
  scroll-snap-type: y mandatory;
  overflow-y: auto;
}

.lp {
  width: 100%;
}

.scene {
  position: relative;
  height: 100vh;
  min-height: 100svh;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 0;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  scroll-snap-align: start;
}

.scene__visual {
  position: relative;
  width: 100%;
  max-width: 480px;
  aspect-ratio: 9 / 16;
  margin: 0 auto;
  background-position: center;
  background-size: contain;
  background-repeat: no-repeat;
  background-color: #000000;
}

.scene__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.15) 0%, rgba(0, 0, 0, 0.45) 100%);
}

.scene__content {
  width: 100%;
  flex: 1 1 auto;
  background: #111111;
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-xl);
}

.scene__eyebrow {
  margin: 0 0 var(--spacing-sm);
  font-size: 0.9rem;
  font-weight: 800;
  opacity: 0.9;
}

.scene__title {
  margin: 0;
  font-size: clamp(2rem, 9vw, 3rem);
  font-weight: 900;
}

.scene--hero .scene__title {
  font-size: clamp(2.2rem, 10vw, 3.2rem);
}

.scene--cta {
  justify-content: flex-end;
}

.scene__cta {
  margin-top: var(--spacing-lg);
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 52px;
  width: 100%;
  border-radius: var(--radius-pill);
  text-decoration: none;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 900;
  box-shadow: var(--shadow-soft);
}

.scene__cta:active {
  background: var(--color-accent-dark);
}

.fixed-cta {
  position: fixed;
  left: 50%;
  bottom: var(--spacing-sm);
  transform: translateX(-50%);
  width: calc(100% - (var(--spacing-md) * 2));
  max-width: calc(480px - (var(--spacing-md) * 2));
  z-index: 1000;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: var(--cta-height);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: #ffffff;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(255, 107, 53, 0.45);
}

.scene--p1 .scene__visual {
  background-image: url("../images/panels/p1.png");
}

.scene--p2 .scene__visual {
  background-image: url("../images/panels/p2.png");
}

.scene--p3 .scene__visual {
  background-image: url("../images/panels/p3.png");
}

.scene--p4 .scene__visual {
  background-image: url("../images/panels/p4.png");
}

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