/* Kotoage Care — 共通スタイル
 * デザイン定義書: docs/design/kotoage-care-design-spec.md (v2.0)
 * 参考 (デザインギャラリー掲載): 面と色 = Cerebrium (Awwwards SOTD) / 語り口とボタン・カード = Tines (SaaS Landing Page)
 *   / データ表現 = DeepBook (Awwwards Technology)。ブランド色 LINE グリーンは「行動」と「サポート中」だけ。和風モチーフなし。
 */
:root {
  --bg: #0B0E17;
  --surface: #11162A;
  --surface-2: #18203A;
  --text: #E8ECF4;
  --text-dim: #A3ADC2;
  --text-muted: #7F8AA3;
  --border: rgba(198, 206, 224, 0.12);
  --border-strong: rgba(198, 206, 224, 0.22);
  --green: #06C755;
  --green-dim: #05A847;
  --amber: #FFB547;
  --red: #FF5C7A;
  --blue: #5B9BFF;
  --c-violet: #A695FD;
  --c-pink: #FF8FB1;
  --c-sky: #7FB4FF;
  --radius: 16px;
  --font: "Inter Tight", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Meiryo", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, Menlo, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", monospace; /* 和文は等幅にせず Noto Sans JP へ */
}* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.75; -webkit-font-smoothing: antialiased; font-feature-settings: "palt" 1; }
img { max-width: 100%; height: auto; }
a { color: var(--blue); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* nav */
.top { position: sticky; top: 0; z-index: 50; background: rgba(11, 14, 23, 0.85); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.top .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.brand .care { color: var(--green); }
.top nav { margin-left: auto; display: flex; gap: 18px; align-items: center; }
.top nav a { color: var(--text-dim); text-decoration: none; font-size: 14px; }
.top nav a:hover { color: var(--text); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 15px; text-decoration: none; border: 1px solid transparent; cursor: pointer; min-height: 44px; transition: background .2s ease-out, border-color .2s ease-out, transform .2s ease-out; }
.btn-primary { background: var(--green); color: #03140A; box-shadow: 0 0 0 1px rgba(6, 199, 85, 0.4), 0 8px 24px rgba(6, 199, 85, 0.22); }
.btn-primary:hover { background: #2ED673; }
.btn-secondary { background: rgba(255, 255, 255, 0.03); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { border-color: rgba(255, 255, 255, 0.28); background: rgba(255, 255, 255, 0.06); }
.btn.is-disabled { opacity: 0.55; cursor: not-allowed; box-shadow: none; }

/* sections */
section { padding: 80px 0; }
section + section { border-top: 1px solid var(--border); }
h1, h2, h3 { line-height: 1.3; letter-spacing: -0.015em; }
h2 { font-size: clamp(24px, 3.2vw, 34px); margin: 0 0 12px; }
.lead { color: var(--text-dim); font-size: 17px; max-width: 760px; margin: 0 0 40px; }
.kicker { color: var(--green); font-family: var(--mono); font-weight: 500; font-size: 13px; letter-spacing: 0.04em; margin-bottom: 10px; }

/* hero */
.hero { padding: 88px 0 72px; position: relative; isolation: isolate; }
/* 背景: グリッド線 + 上部の光 (緑 = Kotoage、紫 = Tines のセキュリティ色)。ヒーローだけ */
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(ellipse 45% 55% at 38% 0%, rgba(6, 199, 85, 0.15), transparent 70%),
    radial-gradient(ellipse 40% 50% at 70% 0%, rgba(166, 149, 253, 0.14), transparent 70%),
    linear-gradient(rgba(198, 206, 224, 0.05) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(90deg, rgba(198, 206, 224, 0.05) 1px, transparent 1px) 0 0 / 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 75% 90% at 50% 0%, #000 45%, transparent 100%); mask-image: radial-gradient(ellipse 75% 90% at 50% 0%, #000 45%, transparent 100%); }
.hero h1 { font-size: clamp(30px, 4.8vw, 52px); margin: 0 0 18px; letter-spacing: -0.02em; font-weight: 700; }
.hero h1 .hl { color: var(--green); }
.hero .sub { color: var(--text-dim); font-size: 18px; max-width: 680px; margin: 0 0 28px; }
.hero .cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .note { color: var(--text-muted); font-size: 13px; margin-top: 16px; }

/* cards */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h3 { font-size: 18px; margin: 0 0 8px; }
.card p { color: var(--text-dim); font-size: 14.5px; margin: 0; }
.card .icon { font-size: 26px; margin-bottom: 10px; }

/* flow */
.flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: step; }
.flow .step { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.flow .step::before { counter-increment: step; content: "STEP " counter(step); color: var(--green); font-size: 12px; font-weight: 700; letter-spacing: 0.08em; }
.flow .step h3 { margin: 6px 0 8px; font-size: 18px; }
.flow .step p { margin: 0; color: var(--text-dim); font-size: 14.5px; }
.flow .step .price { display: inline-block; margin-top: 12px; font-weight: 700; color: var(--text); }

/* checks list */
.checks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; list-style: none; padding: 0; margin: 0; }
.checks li { padding: 12px 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; font-size: 14.5px; }
.checks li b { color: var(--text); }
.checks li span { display: block; color: var(--text-dim); font-size: 13px; }

/* plans */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.plan { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border); border-radius: 18px; padding: 26px; }
.plan.featured { border-color: var(--green); box-shadow: 0 0 0 1px var(--green), 0 20px 50px rgba(6, 199, 85, 0.12); }
.plan .badge { align-self: flex-start; background: rgba(6, 199, 85, 0.12); color: var(--green); font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 10px; }
.plan h3 { margin: 0; font-size: 19px; }
.plan .price { font-size: 34px; font-weight: 800; margin: 12px 0 0; }
.plan .unit { color: var(--text-dim); font-size: 13px; margin-bottom: 16px; }
.plan ul { margin: 0 0 22px; padding-left: 18px; color: var(--text-dim); font-size: 14px; flex: 1; }
.plan ul li { margin: 4px 0; }
.plan .btn { width: 100%; }
.plans-sub { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 18px; }
.tax-note { color: var(--text-muted); font-size: 12.5px; margin-top: 14px; }

/* line mock (見守りの承認フロー) */
.mock { background: #0b0f14; border: 1px solid var(--border); border-radius: 22px; padding: 18px; max-width: 380px; }
.mock .b { padding: 10px 13px; border-radius: 16px; font-size: 13.5px; margin: 8px 0; max-width: 88%; }
.mock .bot { background: var(--surface-2); }
.mock .me { background: var(--green); color: #04260f; margin-left: auto; width: fit-content; }
.mock .cardm { background: var(--surface-2); border: 1px solid rgba(240, 140, 0, 0.5); border-radius: 12px; overflow: hidden; font-size: 13px; }
.mock .cardm .h { background: var(--amber); color: #fff; font-weight: 700; padding: 7px 12px; }
.mock .cardm .t { padding: 10px 12px; color: var(--text); }
.mock .cardm .a { display: flex; gap: 6px; padding: 0 12px 12px; }
.mock .cardm .a span { flex: 1; text-align: center; padding: 6px; border-radius: 8px; background: rgba(255, 255, 255, 0.06); color: var(--text-dim); font-size: 12px; }
.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }

/* notice / scope */
.notice { background: rgba(240, 140, 0, 0.06); border: 1px solid rgba(240, 140, 0, 0.35); border-radius: var(--radius); padding: 20px 22px; color: var(--text-dim); font-size: 14.5px; }
.notice h3 { color: var(--text); margin: 0 0 8px; font-size: 16px; }
.notice ul { margin: 0; padding-left: 18px; }

/* faq */
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; }
.faq summary { cursor: pointer; padding: 16px 18px; font-weight: 600; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--green); font-weight: 700; }
.faq details[open] summary::after { content: "−"; }
.faq .a { padding: 0 18px 16px; color: var(--text-dim); font-size: 14.5px; }

/* footer */
footer { border-top: 1px solid var(--border); padding: 40px 0 56px; color: var(--text-muted); font-size: 13px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--text); }

/* draft banner (法務ページ) */
.draft { background: rgba(224, 49, 49, 0.08); border: 1px solid rgba(224, 49, 49, 0.4); color: #ffb3b3; border-radius: 10px; padding: 12px 16px; font-size: 14px; margin: 24px 0; }
.legal h1 { font-size: 28px; }
.legal table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.legal th, .legal td { border: 1px solid var(--border); padding: 12px 14px; text-align: left; vertical-align: top; }
.legal th { width: 30%; background: var(--surface); font-weight: 600; }
.legal td .todo { color: #ffb3b3; }
.legal h2 { font-size: 20px; margin-top: 36px; }
.legal p, .legal li { color: var(--text-dim); font-size: 14.5px; }

@media (max-width: 860px) {
  section { padding: 56px 0; }
  .wrap { padding: 0 18px; }
  .top nav a.hide-m { display: none; }
  .hero { padding: 44px 0 40px; }
  .hero .sub { font-size: 16px; }
  .hero .cta { display: grid; grid-template-columns: 1fr; }
  .grid-3, .flow, .plans, .plans-sub, .checks, .split { grid-template-columns: 1fr; }
  .split { gap: 28px; }
  .mock { max-width: none; }
  .legal th, .legal td { display: block; width: 100%; }
  .legal th { border-bottom: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }