/* ============================================================
   ムジン株式会社 セミナー集客LP テンプレート
   カラー・フォントは :root の変数だけ差し替えれば全体に反映されます

   レイアウト概要：
   ヘッダー（固定）
   └ .layout（2カラムグリッド）
      ├ .hero-block   … FV画像＋タイトル＋リード文
      ├ .content-block … セッション詳細＋開催概要
      └ .form-sidebar … 申込みフォーム（右側に常駐・sticky）
   フッター
   ============================================================ */

:root {
  --color-primary: #16274f;
  --color-primary-dark: #0d1a38;
  --color-primary-light: #e8edf7;
  --color-primary-tint: #f4f7fc;
  --color-accent: #f4b400;
  --color-accent-dark: #d99900;
  --color-text: #1a1a1a;
  --color-text-sub: #5c5c5c;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fb;
  --color-border: #e2e6ee;
  --color-white: #ffffff;

  --font-base: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  --header-height: 64px;
  --sidebar-width: 360px;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(22, 39, 79, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  padding-top: var(--header-height);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

.block-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-primary);
  display: inline-block;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 40px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 16px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
  box-shadow: 0 6px 16px rgba(244, 180, 0, 0.4);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  transform: translateY(-2px);
}

.btn-small {
  padding: 10px 24px;
  font-size: 14px;
}

/* ---------- ヘッダー ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

/* ---------- ヘッダー・フッターなしページ（集客LP用） ---------- */
body.no-header {
  padding-top: 0;
}

body.no-header .form-sidebar {
  top: 24px;
}

/* ---------- 全体レイアウト（2カラム＋常駐フォーム） ---------- */
.layout {
  max-width: 1400px;
  margin: 0 auto;
  padding: 40px 24px 0;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  column-gap: 48px;
  grid-template-areas:
    "hero   aside"
    "content aside";
  align-items: start;
}

.hero-block {
  grid-area: hero;
}

.content-block {
  grid-area: content;
  padding-bottom: 80px;
}

/* ---------- FV画像 ---------- */
.fv-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
}

.fv-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fv-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  color: var(--color-text-sub);
  font-weight: 700;
  text-align: center;
}

.fv-placeholder small {
  font-weight: 400;
  font-size: 12px;
}

/* ---------- タイトル・リード文 ---------- */
.title-block {
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 48px;
}

.seminar-title {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 20px;
}

.lead-text {
  font-size: 15px;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}

.meta-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta-badges li {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 700;
}

/* ---------- SESSIONS（登壇者カード） ---------- */
.sessions {
  margin-bottom: 64px;
}

.session-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.session-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

.session-thumb-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
}

.session-thumb-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.session-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  color: var(--color-text-sub);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.session-card-meta {
  margin-bottom: 4px;
}

.session-time-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-tint);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.session-card-title {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.6;
  margin-bottom: 8px;
}

.speaker-line {
  font-size: 13px;
  color: var(--color-text-sub);
}

.speaker-line strong {
  color: var(--color-text);
  font-size: 14px;
}

/* ---------- アコーディオン（セッション内容／登壇者紹介） ---------- */
.accordion {
  border-top: 1px solid var(--color-border);
}

.accordion-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  font-size: 14px;
  font-weight: 700;
  padding: 16px 4px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--color-primary-dark);
}

.accordion-q::after {
  content: "+";
  color: var(--color-primary);
  font-size: 18px;
  flex-shrink: 0;
}

.accordion.is-open .accordion-q::after {
  content: "－";
}

.accordion-a {
  display: none;
  padding: 0 4px 20px;
  font-size: 14px;
  color: var(--color-text-sub);
}

.accordion-a p + p {
  margin-top: 10px;
}

.accordion.is-open .accordion-a {
  display: block;
}

/* ---------- OUTLINE ---------- */
.outline-table {
  width: 100%;
  border-collapse: collapse;
}

.outline-table th,
.outline-table td {
  text-align: left;
  padding: 20px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  vertical-align: top;
}

.outline-table th {
  width: 160px;
  color: var(--color-primary-dark);
  font-weight: 700;
  background: var(--color-bg-alt);
}

.outline-table ul {
  padding-left: 4px;
}

.outline-table li {
  position: relative;
  padding-left: 14px;
  color: var(--color-text-sub);
  font-size: 13px;
}

.outline-table li::before {
  content: "・";
  position: absolute;
  left: 0;
}

/* ---------- 申込みフォーム（右側常駐） ---------- */
.form-sidebar {
  grid-area: aside;
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.form-sidebar-inner {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
}

.form-sidebar-eyebrow {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.form-sidebar-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
}

.form-sidebar-meta {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.form-sidebar-meta li {
  font-size: 13px;
  color: var(--color-text-sub);
  padding-left: 16px;
  position: relative;
}

.form-sidebar-meta li + li {
  margin-top: 6px;
}

.form-sidebar-meta li::before {
  content: "・";
  position: absolute;
  left: 0;
}

.hubspot-form-target {
  min-height: 200px;
}

.hubspot-placeholder {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-alt);
  color: var(--color-text-sub);
  font-size: 13px;
  text-align: center;
  padding: 40px 16px;
}

/* ---------- フッター ---------- */
.footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  padding: 40px 24px;
  font-size: 12px;
  margin-top: 40px;
}

.footer .logo {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-white);
  margin-bottom: 12px;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "hero"
      "content"
      "aside";
    padding-top: 24px;
  }

  .form-sidebar {
    position: static;
    margin-bottom: 40px;
  }

  .outline-table th {
    width: 110px;
  }
}

@media (max-width: 560px) {
  .layout {
    padding: 20px 16px 0;
  }

  .form-sidebar-inner {
    padding: 20px 16px;
  }

  .session-card {
    padding: 20px;
  }

  .header-inner {
    padding: 0 16px;
  }
}