/* ------------------------------------------------------------------
   スキマシアター — 公式サイト
   アプリ本体と同じ Material 3 Expressive のトークンを使う。
   ライトモードに寄せた単一デザイン。
   ------------------------------------------------------------------ */

@font-face {
  font-family: "Material Symbols Rounded";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/material-symbols-rounded.woff2") format("woff2");
}

:root {
  color-scheme: light;

  --primary: #0b57d0;
  --on-primary: #ffffff;
  --primary-container: #d3e3fd;
  --on-primary-container: #041e49;
  --secondary-container: #dce2f9;
  --on-secondary-container: #131c2b;
  --tertiary-container: #ffd8ee;
  --on-tertiary-container: #2e1125;

  --surface: #faf9fd;
  --surface-container-low: #f3f3fa;
  --surface-container: #eeedf3;
  --surface-container-high: #e9e8ef;
  --on-surface: #1b1b1f;
  --on-surface-variant: #44474e;
  --outline: #74777f;
  --outline-variant: #c4c6d0;

  --shape-card: 20px;
  --shape-chip: 8px;
  --shape-full: 9999px;

  --elev-1: 0 1px 2px rgb(11 87 208 / 0.10), 0 1px 3px 1px rgb(11 87 208 / 0.07);
  --elev-2: 0 2px 6px 2px rgb(11 87 208 / 0.10), 0 1px 2px rgb(11 87 208 / 0.14);

  --font: Roboto, "Helvetica Neue", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
  --gutter: 24px;
  --max: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--on-surface);
  background: var(--surface);
  background-image:
    radial-gradient(80rem 40rem at 78% -12%, #e4edfd 0%, rgba(228, 237, 253, 0) 62%),
    radial-gradient(60rem 36rem at 4% 4%, #eef2fe 0%, rgba(238, 242, 254, 0) 58%);
  background-repeat: no-repeat;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.icon {
  font-family: "Material Symbols Rounded";
  font-weight: 400;
  font-style: normal;
  line-height: 1;
  display: inline-block;
  flex: none;
  font-feature-settings: "liga";
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  user-select: none;
}
.icon--fill { font-variation-settings: "FILL" 1, "wght" 400, "GRAD" 0, "opsz" 24; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

a { color: var(--primary); }
a:hover { text-decoration: none; }

/* ---------------------------------------------------------- ヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgb(250 249 253 / 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--on-surface);
  text-decoration: none;
}
.brand svg { display: block; border-radius: 10px; }
.site-header__spacer { flex: 1; }
.header-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface-variant);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: var(--shape-full);
}
.header-link:hover { background: var(--surface-container); color: var(--on-surface); }
.header-link { white-space: nowrap; }

/* ---------------------------------------------------------- ヒーロー */
.hero { padding: 56px 0 72px; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 14px;
  border-radius: var(--shape-chip);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.eyebrow .icon { font-size: 18px; }

h1 {
  margin: 20px 0 0;
  font-size: clamp(32px, 4.8vw, 48px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}
h1 .accent { color: var(--primary); white-space: nowrap; }

.lede {
  margin: 20px 0 0;
  font-size: 17px;
  color: var(--on-surface-variant);
  max-width: 30em;
}

.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 14px;
  border-radius: var(--shape-chip);
  border: 1px solid var(--outline-variant);
  background: rgb(255 255 255 / 0.7);
  font-size: 14px;
  font-weight: 500;
  color: var(--on-surface-variant);
}
.badge .icon { font-size: 18px; color: var(--primary); }

.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 32px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 56px;
  padding: 0 28px;
  border-radius: var(--shape-full);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border: none;
  transition: box-shadow 160ms ease, transform 160ms ease;
}
.button--filled { background: var(--primary); color: var(--on-primary); box-shadow: var(--elev-1); }
.button--filled:hover { box-shadow: var(--elev-2); transform: translateY(-1px); }
.button--outlined {
  background: transparent;
  color: var(--primary);
  box-shadow: inset 0 0 0 1px var(--outline);
}
.button--outlined:hover { background: var(--surface-container); }
.button[aria-disabled="true"] {
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  box-shadow: none;
  cursor: default;
  pointer-events: none;
}
.cta__note { font-size: 13px; color: var(--on-surface-variant); }

/* ---------------------------------------------------------- 端末モック */
.device {
  width: 300px;
  margin: 0 auto;
  border-radius: 40px;
  padding: 10px;
  background: #dfe3ec;
  box-shadow:
    0 24px 60px rgb(4 30 73 / 0.16),
    0 2px 6px rgb(4 30 73 / 0.10),
    inset 0 0 0 1px rgb(255 255 255 / 0.6);
}
.screen {
  border-radius: 31px;
  background: var(--surface);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 600px;
}
.screen__status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px 0;
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface);
}
.screen__status .icon { font-size: 13px; }
.screen__bar {
  padding: 14px 18px 6px;
  font-size: 19px;
  font-weight: 400;
}
.screen__body { flex: 1; overflow: hidden; padding: 0 16px; }
.screen__h {
  margin: 14px 0 10px;
  font-size: 15px;
  font-weight: 700;
}
.screen__row { display: flex; gap: 7px; flex-wrap: wrap; }
.screen__row--nowrap { flex-wrap: nowrap; overflow: hidden; }
.m-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 30px;
  padding: 0 11px;
  border-radius: var(--shape-chip);
  border: 1px solid var(--outline);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--on-surface-variant);
  background: transparent;
  white-space: nowrap;
}
.m-chip .icon { font-size: 15px; }
.m-chip--on {
  background: var(--secondary-container);
  border-color: transparent;
  color: var(--on-secondary-container);
}
.m-slider { margin: 14px 0 4px; }
.m-slider__track {
  height: 14px;
  border-radius: 7px;
  background: var(--secondary-container);
  position: relative;
}
.m-slider__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 42%;
  border-radius: 7px;
  background: var(--primary);
}
.m-slider__handle {
  position: absolute;
  left: 42%;
  top: -14px;
  width: 4px;
  height: 42px;
  border-radius: 2px;
  background: var(--primary);
  transform: translateX(-50%);
  box-shadow: 0 0 0 3px var(--surface);
}
.m-slider__labels {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-variant);
}
.m-slider__labels b { color: var(--primary); }
.m-button {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 46px;
  border-radius: var(--shape-full);
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14.5px;
  font-weight: 500;
}
.m-button .icon { font-size: 19px; }
.m-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 22px;
  background: var(--surface-container-low);
}
.m-row__lead {
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--primary-container);
  color: var(--on-primary-container);
}
.m-row__lead .icon { font-size: 19px; }
.m-row__t { font-size: 13.5px; line-height: 1.4; }
.m-row__s { font-size: 11.5px; color: var(--on-surface-variant); line-height: 1.4; }
.screen__nav {
  display: flex;
  background: var(--surface-container);
  padding: 8px 0 14px;
}
.screen__nav > div {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 10px;
  font-weight: 500;
  color: var(--on-surface-variant);
}
.screen__nav .pill {
  width: 52px;
  height: 26px;
  border-radius: var(--shape-full);
  display: grid;
  place-items: center;
}
.screen__nav .pill .icon { font-size: 19px; }
.screen__nav .on { color: var(--on-surface); }
.screen__nav .on .pill { background: var(--secondary-container); color: var(--on-secondary-container); }

/* ---------------------------------------------------------- セクション */
section { padding: 72px 0; }
.section-head { max-width: 34em; }
h2 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.005em;
}
.section-head p { margin: 14px 0 0; color: var(--on-surface-variant); font-size: 16px; }

/* 使い方の3ステップ */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.step {
  background: #ffffff;
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-card);
  padding: 24px;
}
.step__n {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 700;
}
.step h3 { margin: 16px 0 6px; font-size: 17px; font-weight: 700; }
.step p { margin: 0; font-size: 14.5px; color: var(--on-surface-variant); }
.step__eg {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface-container-low);
  font-size: 13.5px;
  color: var(--on-surface);
}
.step__eg b { color: var(--primary); font-weight: 700; }

/* 特徴 */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.feature {
  display: flex;
  gap: 18px;
  padding: 26px;
  border-radius: var(--shape-card);
  background: #ffffff;
  border: 1px solid var(--outline-variant);
}
.feature__icon {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--primary-container);
  color: var(--on-primary-container);
}
.feature__icon .icon { font-size: 24px; }
.feature h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; }
.feature p { margin: 0; font-size: 14.5px; color: var(--on-surface-variant); }

/* 配信中 */
.release {
  border-radius: 28px;
  padding: 48px;
  background: linear-gradient(135deg, var(--primary-container) 0%, var(--tertiary-container) 140%);
  color: var(--on-primary-container);
  text-align: center;
}
.release h2 { color: var(--on-primary-container); }
.release p { margin: 14px auto 0; max-width: 32em; color: var(--on-primary-container); opacity: 0.86; }
.release .cta { justify-content: center; }

/* 出典 */
.sources {
  border-radius: var(--shape-card);
  border: 1px solid var(--outline-variant);
  background: #ffffff;
  padding: 28px;
  margin-top: 32px;
}
.source {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--outline-variant);
}
.source:last-child { border-bottom: none; padding-bottom: 0; }
.source:first-child { padding-top: 0; }
.source__logo {
  flex: none;
  min-width: 92px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--surface-container-low);
  padding: 0 10px;
}
.source__logo img { max-width: 100%; max-height: 28px; display: block; }
.source h3 { margin: 0 0 4px; font-size: 15px; font-weight: 700; }
.source p { margin: 0; font-size: 13.5px; color: var(--on-surface-variant); }

/* ---------------------------------------------------------- フッター */
.site-footer {
  border-top: 1px solid var(--outline-variant);
  padding: 40px 0;
  margin-top: 24px;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
}
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer a { font-size: 14px; color: var(--on-surface-variant); text-decoration: none; }
.site-footer a:hover { color: var(--primary); text-decoration: underline; }
.site-footer__copy { flex: 1; text-align: right; font-size: 13px; color: var(--on-surface-variant); }

/* ---------------------------------------------------------- 本文ページ */
.doc { padding: 56px 0 24px; max-width: 46em; }
.doc h1 { font-size: clamp(28px, 4vw, 38px); margin: 0 0 8px; }
.doc .updated { color: var(--on-surface-variant); font-size: 14px; margin: 0 0 40px; }
.doc h2 { font-size: 21px; margin: 40px 0 10px; }
.doc p, .doc li { font-size: 15.5px; color: var(--on-surface-variant); }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: 6px; }
.doc strong { color: var(--on-surface); }
.doc .callout {
  margin: 28px 0;
  padding: 20px 24px;
  border-radius: var(--shape-card);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
}
.doc .callout p { color: inherit; margin: 0; font-size: 15.5px; }

/* ---------------------------------------------------------- レスポンシブ */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
  .hero__copy { text-align: center; }
  .hero__copy .lede { margin-inline: auto; }
  .badges, .cta { justify-content: center; }
  .steps { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }
  .section-head { margin-inline: auto; text-align: center; }
}

@media (max-width: 560px) {
  :root { --gutter: 20px; }
  .site-header__inner { height: 60px; gap: 2px; }
  .brand { font-size: 15px; }
  .brand svg { width: 28px; height: 28px; }
  .header-link { padding: 8px 10px; font-size: 13px; }
  section { padding: 56px 0; }
  .hero { padding: 36px 0 48px; }
  .release { padding: 36px 24px; }
  .sources { padding: 20px; }
  .site-footer__inner { flex-direction: column; align-items: flex-start; }
  .site-footer__copy { text-align: left; }
  .device { width: min(300px, 100%); }
}

@media (max-width: 400px) {
  .header-link--secondary { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button:hover { transform: none; }
}