/* ===== CSS VARIABLES ===== */
:root {
  --bg: #0b0b10;            /* 真っ黒ではなく少し柔らかい黒 */
  --bg-elev: #111118;        /* カード背景 */
  --bg-soft: #0e0e14;        /* セクション背景差 */
  --text: #f2f3f5;
  --muted: #b6bac3;
  --border: #242633;
  --accent0: #44C8FF;        /* brand light blue */
  --accent1: #4A4AFF;        /* brand blue */
  --white: #ffffff;
  --shadow: rgba(0,0,0,0.35);
  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --container: 1200px;       /* コンテンツ最大幅 */
}

/* Photo variables injected */
:root {
  --photo-hero: url('https://images.unsplash.com/photo-1498050108023-c5249f4df085?auto=format&fit=crop&w=1600&q=80');
  --photo-s1: url('https://images.unsplash.com/photo-1522071820081-009f0129c71c?auto=format&fit=crop&w=800&q=80');
  --photo-s2: url('https://images.unsplash.com/photo-1461749280684-dccba630e2f6?auto=format&fit=crop&w=800&q=80');
  --photo-s3: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?auto=format&fit=crop&w=800&q=80');
  --photo-s4: url('https://images.unsplash.com/photo-1460925895917-afdab827c52f?auto=format&fit=crop&w=800&q=80');
}

/* ===== RESET & BASICS ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "YuGothic", "Meiryo", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(122,0,255,0.18), transparent 60%),
              radial-gradient(900px 500px at -10% 10%, rgba(0,200,255,0.14), transparent 55%),
              var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "YuGothic", "Meiryo", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(122,0,255,0.18), transparent 60%),
              radial-gradient(900px 500px at -10% 10%, rgba(0,200,255,0.14), transparent 55%),
              var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
svg { vertical-align: middle; }

.container { width: min(100% - clamp(24px, 6vw, 96px), var(--container)); margin-inline: auto; }
.stack-32 > * + * { margin-top: 32px; }
.stack-24 > * + * { margin-top: 24px; }
.stack-16 > * + * { margin-top: 16px; }

/* ===== ACCESSIBILITY ===== */
.skip-link {
  position: absolute; left: -999px; top: auto;
  background: var(--bg-elev); color: var(--text);
  padding: 8px 12px; border-radius: 8px;
}
.skip-link:focus { left: 8px; top: 8px; z-index: 9999; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ===== HEADER ===== */
header {
  position: sticky; top: 0; z-index: 10000;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }

/* ---- Logo area ---- */
.brand { display: inline-flex; align-items: center; gap: 14px; }
.logo-box { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; background: #0f0f16; border: 1px solid var(--border); box-shadow: 0 6px 20px var(--shadow) inset; }

/* フォールバックのテキストロゴ（SVG差替え推奨） */
.brand-wordmark {
  font-weight: 700; letter-spacing: 0.2px; font-size: clamp(16px, 1.9vw, 20px);
  display: inline-flex; align-items: baseline; gap: 2px;
}
.brand-wordmark .coder { color: var(--white); }
.brand-wordmark .less {
  background: linear-gradient(90deg, #c9c9c9, #7e7e86);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand-wordmark .dotai {
  background: linear-gradient(90deg, var(--accent0), var(--accent1));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 10px rgba(255,255,255,0.2));
}

.brand-svg { height: 36px; width: auto; display: block; }

/* ---- Nav ---- */
nav ul { list-style: none; display: flex; gap: clamp(12px, 2vw, 28px); padding: 0; margin: 0; }
.menu-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px; border-radius: 10px; border: 1px solid var(--border); background: #12121a; box-shadow: 0 6px 16px rgba(0,0,0,0.35); }
.icon-bars rect { fill: #e9ebf2; }
.icon-x path { stroke: #e9ebf2; }
nav a { color: var(--muted); font-weight: 600; font-size: 14px; opacity: 0.95; }
nav a:hover { color: var(--text); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 18px; border-radius: 999px;
  background: linear-gradient(90deg, color-mix(in oklab, var(--accent0) 90%, transparent), color-mix(in oklab, var(--accent1) 90%, transparent));
  color: #ffffff; font-weight: 900; border: 1px solid color-mix(in oklab, var(--accent0) 60%, var(--accent1) 60%);
  box-shadow: 0 10px 28px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.35);
  white-space: nowrap; text-shadow: 0 1px 2px rgba(0,0,0,0.45);
}

/* ===== HERO ===== */
.hero { padding: clamp(48px, 5vw, 80px) 0; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(24px, 5vw, 56px); align-items: center; }
.eyebrow { font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
h1 { font-size: clamp(28px, 5vw, 48px); line-height: 1.2; margin: 8px 0 0 0; }
.lead { font-size: clamp(16px, 2.2vw, 18px); color: #d9dbe2; }

.sample-visual {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--photo-hero);
  background-size: cover; background-position: 50% 40%;
  box-shadow: 0 10px 30px var(--shadow);
  overflow: hidden; position: relative; min-height: 420px;
}
/* シンプルな(仮)ビジュアル */
.sample-visual::before, .sample-visual::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(500px 220px at 20% 30%, rgba(255,255,255,0.15), transparent 60%),
              radial-gradient(360px 200px at 80% 70%, rgba(255,255,255,0.10), transparent 70%);
  mix-blend-mode: screen; pointer-events: none;
}

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin-top: 12px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; font-weight: 800;
  padding: 12px 18px; border-radius: 12px; border: 1px solid var(--border);
  background: #151722; color: var(--text);
  box-shadow: 0 8px 22px var(--shadow), inset 0 1px 0 rgba(255,255,255,0.06);
}
.btn:hover { transform: translateY(-1px); }

/* ===== MESSAGE ===== */
section { padding: clamp(40px, 5vw, 72px) 0; scroll-margin-top: 92px; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 24px; }
.section-head h2 { font-size: clamp(22px, 3.4vw, 30px); margin: 0; }
.section-sub { color: var(--muted); font-weight: 600; font-size: 14px; }

.message {
  display: grid; grid-template-columns: 1fr; gap: 18px;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: clamp(18px, 3.5vw, 26px);
}
/* 抒情的レイアウト */
.message.lyric { grid-template-columns: 1.2fr 0.8fr; gap: clamp(16px, 3vw, 32px); align-items: start; }
.lyric-main { }
.kicker-inline { color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; font-weight: 800; font-size: 12px; }
.leadline {
  font-size: clamp(22px, 3.2vw, 28px);
  line-height: 1.25; margin: 8px 0 6px 0;
  background: linear-gradient(90deg, var(--accent0), var(--accent1));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 1px 0 rgba(255,255,255,0.08);
}
.hairline { height: 1px; background: linear-gradient(90deg, rgba(255,255,255,0.24), rgba(255,255,255,0)); border: none; }
.dropcap { text-wrap: pretty; }
.dropcap::first-letter { float: left; font-size: clamp(40px, 6vw, 60px); line-height: 0.9; padding-right: 10px; padding-top: 6px; font-weight: 800; color: #fff; text-shadow: 0 4px 16px rgba(0,0,0,0.35); }
.lyric-aside { position: relative; }
.pullquote {
  font-size: clamp(16px, 2.6vw, 20px); line-height: 1.5; font-weight: 800; margin: 0;
  padding: 14px 14px 14px 16px; border-left: 3px solid; border-image: linear-gradient(180deg, var(--accent0), var(--accent1)) 1;
  color: #e9ebf2;
}
@media (max-width: 960px) {
  /* ナビのモバイル表示 */
  .nav-toggle { display: inline-flex; }
  .primary-nav { position: absolute; top: calc(100% + 8px); left: 12px; right: 12px; background: color-mix(in oklab, var(--bg-elev) 95%, transparent); border: 1px solid var(--border); border-radius: 12px; padding: 12px; box-shadow: 0 14px 36px rgba(0,0,0,0.5); transform-origin: top; transform: scaleY(0.98); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .18s ease, transform .18s ease, visibility .18s; }
  .primary-nav ul { flex-direction: column; gap: 12px; }
  [data-nav-open="true"] .primary-nav { transform: scaleY(1); opacity: 1; visibility: visible; pointer-events: auto; }
  .nav-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.35); }
  .nav-backdrop[hidden] { display: none; }

  /* スマホ時：カード類は折り返し（1カラム） */
  .cards { display: grid; grid-template-columns: 1fr; gap: clamp(16px, 3vw, 22px); }
  .principles { display: grid; grid-template-columns: 1fr; gap: 16px; }
  .company-grid { display: grid; grid-template-columns: 1fr; gap: 22px; }
}

/* ===== SERVICES ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2.2vw, 22px); }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.015)) padding-box,
              linear-gradient(90deg, rgba(68,185,255,0.65), rgba(114,20,255,0.65)) border-box;
  border: 1px solid transparent; border-radius: var(--radius-lg);
  padding: 20px; box-shadow: 0 10px 24px var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
  color: var(--text);
}
.card-link { display: block; color: inherit; text-decoration: none; position: relative; }
.card-link:focus-visible { outline: 2px solid var(--accent0); outline-offset: 3px; }
.card-link-cta {
  position: absolute;
  right: 16px;
  bottom: 16px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #0b0b10;
  background: linear-gradient(90deg, color-mix(in oklab, var(--accent0) 90%, transparent), color-mix(in oklab, var(--accent1) 90%, transparent));
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--accent0) 60%, var(--accent1) 60%);
  box-shadow: 0 6px 16px rgba(0,0,0,0.35);
}
.card-link-cta::after { content: " →"; }
.card-link:hover .card-link-cta {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.45);
}
.card:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(0,0,0,0.45); }
.card h3 { margin-top: 0; font-size: 18px; }
.pill { display: inline-block; padding: 4px 8px; border-radius: 999px; border: 1px solid color-mix(in oklab, var(--border) 85%, #ffffff 15%); font-size: 12px; color: color-mix(in oklab, var(--muted) 40%, #ffffff 60%); background: rgba(255,255,255,0.02); }

.media { aspect-ratio: 16/9; border-radius: var(--radius-md); border: 1px solid var(--border); overflow: hidden; position: relative; background: #141824; background-size: cover; background-position: 50% 45%; }
.cards .card:nth-child(1) .media { background-image: var(--photo-s1); }
.cards .card:nth-child(2) .media { background-image: var(--photo-s2); }
.cards .card:nth-child(3) .media { background-image: var(--photo-s3); }
.cards .card:nth-child(4) .media { background-image: var(--photo-s4); }
.product-cards { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.product-cards .media { background-image: var(--photo-s4); }
.media::after { content: ""; position: absolute; inset: 0; background: none; }

/* ===== PRINCIPLES ===== */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.principle { position: relative; border-radius: var(--radius-lg); padding: 18px; }
.principle.invert { position: relative; overflow: hidden;
background:
  linear-gradient(90deg, var(--accent0), var(--accent1)) 0 0 / 100% 4px no-repeat,
  #f7f8fb;
color: #0b0b10; border: 1px solid #e4e6ee; border-radius: var(--radius-lg);
box-shadow: 0 14px 40px rgba(0,0,0,0.20); }
/* top bar moved to background layer on .principle.invert to avoid 1-2px misalignment */
.kicker { color: #5d6272; text-transform: uppercase; letter-spacing: 0.08em; font-size: 12px; font-weight: 800; }/* ===== PRINCIPLES ===== */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.principle { background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 18px; }
.kicker { color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; font-size: 12px; font-weight: 800; }

/* ===== MARKETING PAIN ===== */
.pain-intro { color: var(--muted); max-width: 72ch; margin: 0 0 18px 0; font-size: clamp(14px, 1.6vw, 16px); }
.pain-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pain-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.015));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow:
    0 14px 30px rgba(4, 6, 20, 0.42),
    0 0 0 1px rgba(160, 226, 255, 0.18),
    0 0 36px rgba(160, 226, 255, 0.35),
    0 0 64px rgba(160, 226, 255, 0.22);
}
.pain-kicker {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent0);
  font-weight: 800;
}
.pain-copy { margin: 8px 0 0 0; font-weight: 700; }
@media (max-width: 960px) {
  .pain-grid { grid-template-columns: 1fr; }
}

/* ===== COMPANY ===== */
.company { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.company-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.company table { width: 100%; border-collapse: collapse; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.company th, .company td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.company th { width: 30%; color: var(--muted); font-weight: 700; }
.company tr:last-child th, .company tr:last-child td { border-bottom: none; }

/* ===== CONTACT ===== */
.cta-box { background: linear-gradient(180deg, rgba(122,0,255,0.12), rgba(0,200,255,0.10)); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: clamp(18px, 3.5vw, 26px); box-shadow: 0 12px 34px var(--shadow); }

footer { border-top: 1px solid var(--border); padding: 24px 0; color: var(--muted); font-size: 14px; }

/* ===== UTILS ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 3vw, 26px); }
/* 読みやすさのための行幅制御 */
.readable { max-width: 72ch; }
/* 角の濃淡アクセント（視線誘導） */
.corner-accent { position: relative; }
.corner-accent::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: radial-gradient(140px 120px at 0% 0%, rgba(255,255,255,0.08), transparent 70%);
  mix-blend-mode: screen;
}
/* 反転ボックス（白黒反転のコントラスト） */
.invert-box { background: #f7f8fb !important; color: #0b0b10; border: 1px solid #e4e6ee; box-shadow: 0 14px 40px rgba(0,0,0,0.28); }
.invert-box a { color: #0b0b10; }
.invert-box .nav-cta { color:#fff; }
/* 交互のセクション濃淡 */
.section-alt { background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent); }

/* === Accessible Responsive Nav (from scratch) === */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.site-header { position: sticky; top: 0; z-index: 10000; }
.brand-svg { height: 36px; width: auto; display: block; }

.nav-toggle { display: none; align-items: center; justify-content: center; gap: 8px; padding: 10px; border-radius: 10px; border: 1px solid var(--border); background: #12121a; box-shadow: 0 6px 16px rgba(0,0,0,0.35); color: var(--text); }
.icon-x { display: none; }
[data-nav-open="true"] .icon-bars { display: none; }
[data-nav-open="true"] .icon-x { display: inline; }

.primary-nav ul { list-style: none; display: flex; gap: clamp(12px, 2vw, 28px); padding: 0; margin: 0; align-items: center; }

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav { position: absolute; top: calc(100% + 8px); left: 12px; right: 12px; background: color-mix(in oklab, var(--bg-elev) 95%, transparent); border: 1px solid var(--border); border-radius: 12px; padding: 12px; box-shadow: 0 14px 36px rgba(0,0,0,0.5); transform-origin: top; transform: scaleY(0.98); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .18s ease, transform .18s ease, visibility .18s; }
  .primary-nav ul { flex-direction: column; gap: 12px; }
  [data-nav-open="true"] .primary-nav { transform: scaleY(1); opacity: 1; visibility: visible; pointer-events: auto; }
  .nav-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.35); }
  .nav-backdrop[hidden] { display: none; }
}

@media (min-width: 961px) {
  .nav-toggle { display: none; }
  .primary-nav { position: static; background: transparent; border: 0; border-radius: 0; padding: 0; box-shadow: none; transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .cards { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 960px) {
  /* 他セクションもスマホで折り返し */
  .hero-grid { grid-template-columns: 1fr; }
  .message.lyric { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 960px) {
  /* 強制上書き（スマホ時に1カラム） */
  .principles { grid-template-columns: 1fr !important; }
  .company-grid { grid-template-columns: 1fr !important; }
}
@media (max-width: 960px) {
  .cards { grid-template-columns: 1fr !important; }
  .card-link { display: block; padding-bottom: 56px; }
  .card-link-cta { position: absolute !important; margin-top: 0; }
}

@media (min-width: 961px) {
  /* デスクトップでは必ず3ペイン */
  .cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)) !important; }
}

@media (min-width: 961px) {
  .cards { grid-template-columns: repeat(3, minmax(0,1fr)) !important; gap: clamp(16px, 2.2vw, 22px) !important; }
}

@media (min-width: 961px) {
  /* デスクトップは見え方を維持しつつ重なり回避 */
  .card-link { padding-bottom: 56px; }
}

@media (min-width: 961px) {
  .company-grid { grid-template-columns: 1fr 1fr !important; }
}