/* ============================================================
   High Light! — Landing Page Styles
   ============================================================ */

:root {
  --pink: #FF3B9A;
  --pink-light: #FF6FB5;
  --purple: #8B5CF6;
  --purple-deep: #6D28D9;
  --grad: linear-gradient(135deg, #FF3B9A 0%, #8B5CF6 100%);
  --grad-soft: linear-gradient(135deg, #FFD9EC 0%, #E5D9FF 100%);

  --bg: #FAFAFC;
  --surface: #FFFFFF;
  --text: #1A1A2E;
  --text-soft: #5C5C75;
  --text-mute: #9999B0;
  --border: #ECECF4;
  --shadow-sm: 0 2px 8px rgba(20, 20, 40, 0.04);
  --shadow-md: 0 8px 24px rgba(20, 20, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(255, 59, 154, 0.18);

  --radius: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, 'Hiragino Kaku Gothic ProN', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.sp-only {
  display: none;
}

@media (max-width: 720px) {
  .sp-only { display: inline; }
}

/* ============================================================
   ヘッダー
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}

.nav a:hover {
  color: var(--pink);
}

.nav-x {
  background: var(--text);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-weight: 700;
}

.nav-x:hover {
  background: var(--pink);
}

@media (max-width: 720px) {
  .nav a:not(.nav-x) { display: none; }
}

/* ============================================================
   ヒーロー
   ============================================================ */

.hero {
  position: relative;
  padding: 80px 0 120px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  z-index: -1;
}

.hero-bg::before,
.hero-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
}

.hero-bg::before {
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: var(--pink);
}

.hero-bg::after {
  bottom: -120px;
  left: -100px;
  width: 480px;
  height: 480px;
  background: var(--purple);
  opacity: 0.4;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 700;
  color: var(--purple-deep);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: clamp(16px, 1.8vw, 18px);
  color: var(--text-soft);
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 900px) {
  .hero-cta { justify-content: center; }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 15px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 70px rgba(255, 59, 154, 0.30);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  background: #fff;
}

.btn-large {
  padding: 18px 38px;
  font-size: 16px;
}

/* ========== Hero Visual ========== */

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-stack {
  position: relative;
  width: 320px;
  height: 580px;
}

.phone {
  position: relative;
  border-radius: 32px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #000;
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.phone-stack .phone {
  position: absolute;
  width: 240px;
  height: 520px;
}

.phone-bg {
  top: 20px;
  left: 0;
  transform: rotate(-6deg);
  opacity: 0.85;
}

.phone-front {
  top: 0;
  right: 0;
  transform: rotate(4deg);
}

@media (max-width: 900px) {
  .phone-stack {
    width: 280px;
    height: 500px;
    margin: 0 auto;
  }
  .phone-stack .phone {
    width: 200px;
    height: 440px;
  }
}

/* ============================================================
   イントロ
   ============================================================ */

.intro {
  padding: 80px 0;
  text-align: center;
}

.intro-text {
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--text);
  line-height: 1.9;
}

.intro-text strong {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 900;
}

/* ============================================================
   ストーリー
   ============================================================ */

.story {
  padding: 40px 0 100px;
}

.story-card {
  max-width: 1040px;
  margin: 0 auto;
  padding: 64px 64px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  text-align: center;
  position: relative;
  overflow: hidden;
}

@media (max-width: 720px) {
  .story-card { padding: 40px 28px; }
}

.story-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad);
}

.story-badge {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.25em;
  color: var(--pink);
  padding: 6px 14px;
  border: 1.5px solid var(--pink);
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
}

.story-title {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  line-height: 1.6;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

.story-title em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 900;
}

.story-text {
  font-size: 15px;
  line-height: 2;
  color: var(--text-soft);
  margin-bottom: 24px;
}

.story-text em {
  font-style: normal;
  font-weight: 700;
  color: var(--pink);
}

.story-text strong {
  font-weight: 700;
  color: var(--text);
}

.story-note {
  font-size: 12px;
  color: var(--text-mute);
  padding-top: 20px;
  border-top: 1px dashed var(--border);
}

/* ============================================================
   セクション共通
   ============================================================ */

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.3;
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--pink);
  margin-bottom: 12px;
}

/* ============================================================
   機能
   ============================================================ */

.features {
  padding: 100px 0 60px;
  background: var(--surface);
}

/* ===== Spotlight（左右交互の大型機能紹介） ===== */

.spotlight {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.spotlight:last-of-type {
  border-bottom: none;
}

.spotlight.reversed .spotlight-text {
  order: 2;
}

.spotlight.reversed .spotlight-image {
  order: 1;
}

@media (max-width: 880px) {
  .spotlight {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 60px 0;
  }
  .spotlight.reversed .spotlight-text,
  .spotlight.reversed .spotlight-image {
    order: initial;
  }
}

.spotlight-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--pink);
  padding: 6px 14px;
  border: 1.5px solid var(--pink);
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
}

/* AI スポットライト専用：ホロ系のグラデで他と差別化 */
.spotlight-label-ai {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}

.badge-new {
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.1em;
  padding: 2px 6px;
  background: #fff;
  color: var(--pink);
  border-radius: 4px;
  line-height: 1.2;
}

/* AI スポットライト：背景に薄いグラデーション */
.spotlight-ai {
  position: relative;
  background: linear-gradient(
    135deg,
    rgba(255, 59, 154, 0.04) 0%,
    rgba(139, 92, 246, 0.04) 100%
  );
  border-radius: var(--radius-lg);
  padding-left: 32px;
  padding-right: 32px;
}

@media (max-width: 880px) {
  .spotlight-ai { padding-left: 20px; padding-right: 20px; }
}

.spotlight-title {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.spotlight-lead {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--text-soft);
  margin-bottom: 28px;
  line-height: 1.9;
}

.spotlight-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.spotlight-list li {
  position: relative;
  padding: 12px 0 12px 28px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-soft);
  border-top: 1px solid var(--border);
}

.spotlight-list li:first-child {
  border-top: none;
}

.spotlight-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 12px;
  font-size: 12px;
  color: var(--pink);
}

.spotlight-list li strong {
  color: var(--text);
  font-weight: 800;
  margin-right: 8px;
}

.spotlight-note {
  margin-top: 16px;
  font-size: 0.78rem;
  color: rgba(20, 20, 40, 0.55);
  letter-spacing: 0.02em;
}

/* スポットライトのスマホフレーム */
.phone-tilt {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  aspect-ratio: 9 / 19.5;
  border-radius: 36px;
  overflow: hidden;
  border: 10px solid #1A1A2E;
  background: #000;
  box-shadow: 0 30px 80px rgba(255, 59, 154, 0.20),
              0 10px 30px rgba(20, 20, 40, 0.15);
  transform: rotate(-2deg);
  transition: transform 0.4s ease;
}

.spotlight.reversed .phone-tilt {
  transform: rotate(2deg);
}

.phone-tilt:hover {
  transform: rotate(0deg) scale(1.02);
}

.phone-tilt img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #000;
}

/* ===== Features Extra（補助機能の小型グリッド） ===== */

.features-extra {
  padding: 80px 0 0;
  text-align: center;
}

.extra-title {
  font-size: clamp(20px, 2.5vw, 26px);
  font-weight: 800;
  margin-bottom: 40px;
  color: var(--text);
  letter-spacing: -0.01em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  text-align: left;
}

.feature-card {
  padding: 32px 28px;
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 59, 154, 0.3);
}

.feature-card.highlight {
  background: var(--grad);
  color: #fff;
  border: none;
}

.feature-card.highlight p {
  color: rgba(255, 255, 255, 0.92);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 16px;
  line-height: 1;
}

.feature-card h3,
.feature-card h4 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
}

/* ============================================================
   機能紹介動画
   ============================================================ */

.demo {
  padding: 100px 0;
  background: var(--surface);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 40px;
  max-width: 800px;
  margin: 0 auto;
}

.demo-video {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.demo-phone {
  position: relative;
  width: 100%;
  max-width: 280px;
  aspect-ratio: 9 / 19.5;
  border-radius: 36px;
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow-lg);
  border: 8px solid #1A1A2E;
}

.demo-phone video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #000;
}

.demo-video figcaption {
  margin-top: 20px;
  text-align: center;
}

.demo-video figcaption strong {
  display: block;
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.demo-video figcaption span {
  font-size: 13px;
  color: var(--text-soft);
}

/* ============================================================
   スクリーンショット
   ============================================================ */

.screenshots {
  padding: 100px 0;
  background: var(--bg);
  overflow: hidden;
}

.screenshot-rail {
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 20px 0 40px;
}

.screenshot-rail::-webkit-scrollbar { display: none; }

.screenshot-track {
  display: flex;
  gap: 24px;
  padding: 0 24px;
  width: max-content;
}

.screenshot-track .phone {
  flex: 0 0 240px;
  width: 240px;
  height: 520px;
}

.screenshot-track figcaption {
  margin-top: 12px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-soft);
}

/* ============================================================
   推しポイント
   ============================================================ */

.why {
  padding: 100px 0;
  background: var(--surface);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.why-card {
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  background: var(--bg);
  border: 1px solid var(--border);
}

.why-num {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 800;
  color: var(--pink);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.why-card h3 {
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.why-card p {
  font-size: 15px;
  color: var(--text-soft);
}

/* ============================================================
   CTA
   ============================================================ */

.cta {
  padding: 120px 0;
  background: var(--grad);
  color: #fff;
  text-align: center;
}

.cta-inner {
  max-width: 720px;
}

.cta h2 {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.cta p {
  font-size: 17px;
  margin-bottom: 36px;
  opacity: 0.95;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta .btn-primary {
  background: #fff;
  color: var(--pink);
}

.cta .btn-primary:hover {
  transform: translateY(-2px);
}

.cta .btn-ghost {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  backdrop-filter: blur(10px);
}

.cta .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* ============================================================
   フッター
   ============================================================ */

.site-footer {
  padding: 64px 0 40px;
  background: var(--text);
  color: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
}

@media (max-width: 720px) {
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

@media (max-width: 720px) {
  .footer-brand { justify-content: center; }
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.footer-brand strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: #fff;
}

.footer-brand span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.footer-nav a:hover {
  color: var(--pink-light);
}

.copy {
  grid-column: 1 / -1;
  padding-top: 32px;
  margin-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}

/* ============================================================
   Scroll Reveal Animation
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}