/* ============================================================
   AIRA Score — ランディングページ（Aurora Ink テーマ）
   ============================================================ */

:root {
  color-scheme: dark;
  --ink: #070b16;
  --panel: rgba(148, 184, 255, 0.045);
  --panel-solid: #0d1526;
  --border: rgba(148, 184, 255, 0.14);
  --border-strong: rgba(148, 184, 255, 0.26);
  --text: #e9eefb;
  --muted: #93a3c0;
  --faint: #61708e;
  --mint: #34d399;
  --cyan: #22d3ee;
  --danger: #f27b72;
  --aurora: linear-gradient(120deg, #34d399 0%, #22d3ee 60%, #4aa8e2 100%);
  font-family: "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.85;
  background:
    radial-gradient(1200px 560px at 82% -14%, rgba(34, 211, 238, 0.14), transparent 62%),
    radial-gradient(1000px 520px at -10% 12%, rgba(52, 211, 153, 0.11), transparent 58%),
    radial-gradient(800px 800px at 50% 120%, rgba(74, 168, 226, 0.09), transparent 60%),
    var(--ink);
  background-attachment: fixed;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, textarea:focus-visible, a:focus-visible { outline: 2px solid var(--mint); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { letter-spacing: 0.01em; }
main > section { max-width: 1040px; margin: 0 auto; padding: 64px 22px; }
main > section > h2 { font-size: clamp(22px, 3.4vw, 30px); margin: 0 0 14px; text-align: center; }
.section-lead { text-align: center; color: var(--muted); margin: 0 auto 34px; max-width: 640px; }
.grad { background: var(--aurora); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ヘッダー */
.lp-header {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 14px 24px;
  position: sticky; top: 0; z-index: 10;
  background: rgba(7, 11, 22, 0.8);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.lp-brand { display: flex; align-items: center; gap: 10px; color: var(--text); }
.lp-brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 26px; border-radius: 8px; background: var(--aurora); box-shadow: 0 0 18px rgba(52, 211, 153, 0.45); }
.brand-name { font-family: "Space Grotesk", "Noto Sans JP", sans-serif; font-size: 17px; font-weight: 700; }
.brand-name em { font-style: normal; background: var(--aurora); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-badge { padding: 2px 8px; border-radius: 99px; border: 1px solid var(--border-strong); color: var(--cyan); font-size: 10px; font-weight: 700; letter-spacing: 0.12em; }
.lp-nav { display: flex; align-items: center; gap: 20px; font-size: 13px; }
.lp-nav a { color: var(--muted); }
.lp-nav a:hover { color: var(--text); text-decoration: none; }
.lp-nav .nav-cta {
  padding: 8px 16px; border-radius: 99px;
  background: var(--aurora); color: #04160f; font-weight: 800;
}
.lp-nav .nav-cta:hover { filter: brightness(1.08); }

/* ヒーロー */
.hero {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 44px; align-items: center;
  padding-top: 72px; padding-bottom: 72px;
}
.hero-kicker { margin: 0 0 10px; color: var(--cyan); font-size: 13px; font-weight: 700; letter-spacing: 0.14em; }
.hero h1 { margin: 0 0 18px; font-size: clamp(30px, 4.6vw, 46px); line-height: 1.35; }
.hero-lead { margin: 0 0 26px; color: var(--muted); font-size: 15px; }
.hero-lead strong { color: var(--text); }
.hero-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.cta-button {
  display: inline-block;
  padding: 14px 30px; border: 0; border-radius: 12px;
  background: var(--aurora); color: #04160f;
  font-weight: 800; font-size: 15px;
  box-shadow: 0 8px 26px rgba(34, 211, 238, 0.25);
}
.cta-button:hover { filter: brightness(1.08); text-decoration: none; }
.cta-button:disabled { opacity: 0.55; cursor: wait; }
.ghost-link { color: var(--muted); font-size: 14px; }
.hero-note { margin: 18px 0 0; color: var(--faint); font-size: 12px; letter-spacing: 0.04em; }

/* ヒーロー右のダッシュボード風モック */
.hero-visual { min-width: 0; }
.mock-window {
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  background: var(--panel-solid);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
.mock-titlebar { display: flex; gap: 6px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.mock-titlebar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(148, 184, 255, 0.18); }
.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; padding: 16px; }
.mock-kpi {
  padding: 12px; border: 1px solid var(--border); border-radius: 12px; background: var(--panel);
  display: grid; gap: 2px;
}
.mock-kpi small { color: var(--faint); font-size: 10.5px; }
.mock-kpi strong { font-size: 26px; font-weight: 800; line-height: 1.2; }
.mock-kpi strong span { font-size: 13px; font-weight: 700; margin-left: 1px; }
.mock-kpi em { font-style: normal; color: var(--faint); font-size: 10px; }
.mock-chart { padding: 4px 16px 16px; }
.mock-chart svg { width: 100%; height: 90px; display: block; }
.mock-chart small { color: var(--faint); font-size: 10.5px; }

/* 課題提起 */
.problem { text-align: center; }
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 30px; text-align: left; }
.problem-card {
  padding: 22px; border: 1px solid var(--border); border-radius: 14px; background: var(--panel-solid);
}
.problem-card h3 { margin: 0 0 8px; font-size: 15.5px; color: var(--mint); }
.problem-card p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* 機能 */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card {
  padding: 22px; border: 1px solid var(--border); border-radius: 14px; background: var(--panel-solid);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.feature-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.feature-num {
  display: inline-block; margin-bottom: 10px;
  font-family: "Space Grotesk", sans-serif; font-size: 12px; font-weight: 700; letter-spacing: 0.1em;
  background: var(--aurora); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.feature-card h3 { margin: 0 0 8px; font-size: 15.5px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; }

/* 流れ */
.flow-steps {
  list-style: none; counter-reset: flow;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  padding: 0; margin: 30px 0 0;
}
.flow-steps li {
  counter-increment: flow;
  padding: 20px 18px;
  border: 1px solid var(--border); border-radius: 14px; background: var(--panel-solid);
  display: grid; gap: 6px; align-content: start;
}
.flow-steps li::before {
  content: "STEP " counter(flow);
  font-family: "Space Grotesk", sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--cyan);
}
.flow-steps strong { font-size: 15px; }
.flow-steps span { color: var(--muted); font-size: 12.5px; }

/* 料金 */
.pricing { text-align: center; }
.pricing-copy { color: var(--muted); margin: 0 0 26px; }
.pricing-copy strong { color: var(--text); }

/* FAQ */
.faq { max-width: 760px; }
.faq details {
  margin: 10px 0; padding: 4px 20px;
  border: 1px solid var(--border); border-radius: 12px; background: var(--panel-solid);
}
.faq summary { cursor: pointer; padding: 12px 0; font-weight: 700; font-size: 14.5px; list-style-position: inside; }
.faq details p { margin: 0 0 14px; color: var(--muted); font-size: 13.5px; }

/* お問い合わせ */
.contact { max-width: 640px; }
.contact-form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 12.5px; font-weight: 700; color: var(--muted); }
.req {
  display: inline-block; margin-left: 4px; padding: 1px 6px;
  border-radius: 4px; background: rgba(242, 123, 114, 0.15); color: var(--danger);
  font-size: 10px; font-weight: 700;
}
.field input, .field textarea {
  padding: 12px 13px;
  border: 1px solid var(--border); border-radius: 10px;
  background: rgba(148, 184, 255, 0.05); color: var(--text);
  resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: var(--faint); }
.field input:focus, .field textarea:focus { border-color: var(--border-strong); outline: none; }
.form-error {
  margin: 0; padding: 11px 14px;
  border: 1px solid rgba(242, 123, 114, 0.4); border-radius: 10px;
  background: rgba(242, 123, 114, 0.08); color: var(--danger); font-size: 13px;
}
.form-error[hidden] { display: none; }
.form-success {
  margin: 0; padding: 11px 14px;
  border: 1px solid rgba(52, 211, 153, 0.4); border-radius: 10px;
  background: rgba(52, 211, 153, 0.08); color: var(--mint); font-size: 13px;
}
.form-success[hidden] { display: none; }
.form-note { margin: 4px 0 0; color: var(--faint); font-size: 11.5px; }

/* フッター */
.lp-footer {
  border-top: 1px solid var(--border);
  padding: 26px 20px 34px;
  text-align: center; color: var(--faint); font-size: 12px;
}
.lp-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; margin-bottom: 10px; }
.lp-footer a { color: var(--muted); }

/* レスポンシブ */
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; padding-top: 46px; }
  .problem-grid, .feature-grid { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  main > section { padding: 44px 16px; }
  .lp-header { padding: 12px 14px; }
  .lp-nav { gap: 10px; }
  .lp-nav a:not(.nav-cta):not(.nav-login) { display: none; }
  .lp-nav .nav-login {
    padding: 7px 14px; border-radius: 99px;
    border: 1px solid var(--border-strong);
    color: var(--text); font-weight: 700; font-size: 12px;
    white-space: nowrap;
  }
  .lp-nav .nav-cta { padding: 7px 14px; font-size: 12px; white-space: nowrap; }
  .brand-badge { display: none; }
  .problem-grid, .feature-grid, .flow-steps, .form-row { grid-template-columns: 1fr; }
  .mock-kpis { grid-template-columns: 1fr 1fr; }
  .mock-kpi:last-child { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .feature-card { transition: none; }
}