/* ============================================================
   もりもり自己流 AI エージェント開発構造 解説サイト
   グローバルスタイルシート
   文字コード: UTF-8 (BOMなし)
   ============================================================ */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

/* ---- CSS 変数 (カラーパレット・デザイントークン) ---- */
:root {
  /* ベースカラー */
  --color-bg: #0a0e1a;
  --color-bg2: #111827;
  --color-surface: rgba(255, 255, 255, 0.05);
  --color-surface2: rgba(255, 255, 255, 0.08);
  --color-border: rgba(255, 255, 255, 0.12);

  /* アクセントカラー */
  --color-primary: #2563eb;
  /* ブルー */
  --color-primary-glow: rgba(37, 99, 235, 0.4);
  --color-secondary: #06b6d4;
  /* シアン */
  --color-accent: #60a5fa;
  /* ライトブルー */
  --color-success: #10b981;
  /* エメラルド */
  --color-warning: #f59e0b;
  /* アンバー */

  /* テキスト */
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;

  /* グラデーション */
  --grad-hero: linear-gradient(135deg, #0f1e3d 0%, #0a0e1a 40%, #0c1a2e 100%);
  --grad-card: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(6, 182, 212, 0.08) 100%);
  --grad-primary: linear-gradient(135deg, #2563eb, #06b6d4);

  /* フォント */
  --font-main: 'Inter', 'Noto Sans JP', sans-serif;

  /* スペーシング */
  --max-width: 1100px;
  --section-gap: 120px;
  --radius: 16px;
  --radius-sm: 8px;

  /* トランジション */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- リセット & ベース ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 背景装飾 */
body::before {
  content: '';
  position: fixed;
  top: -30%;
  left: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -20%;
  right: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.10) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   ナビゲーション
   ============================================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 32px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: width var(--transition);
}

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

.nav-links a:hover::after {
  width: 100%;
}

/* ハンバーガー */
#nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

#nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   セクション共通
   ============================================================ */
section {
  position: relative;
  z-index: 1;
  padding: 100px 32px;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding: 4px 12px;
  border: 1px solid rgba(37, 99, 235, 0.4);
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 650px;
  margin-bottom: 56px;
}

/* フェードインアニメーション */
.fade-in {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   ヒーローセクション
   ============================================================ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--grad-hero);
  padding: 120px 32px 80px;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.4);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 24px;
}

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

.hero-desc {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--grad-primary);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  box-shadow: 0 4px 24px var(--color-primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--color-primary-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--color-surface2);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

/* ヒーロービジュアル（右側） */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(16px);
  width: 100%;
  max-width: 420px;
  animation: float 6s ease-in-out infinite;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-12px);
  }
}

.hero-card-title {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  font-weight: 600;
}

.tree-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 4px;
  cursor: pointer;
  transition: background var(--transition);
  font-size: 0.85rem;
}

.tree-item:hover {
  background: var(--color-surface2);
}

.tree-item .icon {
  font-size: 1rem;
}

.tree-item .name {
  color: var(--color-text);
}

.tree-item .role {
  color: var(--color-text-dim);
  font-size: 0.75rem;
  margin-left: auto;
}

.tree-item.folder .name {
  color: var(--color-accent);
}

.tree-item.file .name {
  color: var(--color-secondary);
}

/* ============================================================
   プロジェクト構造セクション
   ============================================================ */
#structure {
  background: var(--color-bg2);
}

.structure-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.folder-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.folder-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-card);
  opacity: 0;
  transition: opacity var(--transition);
}

.folder-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.2);
}

.folder-card:hover::before {
  opacity: 1;
}

.folder-card.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), 0 12px 40px rgba(37, 99, 235, 0.25);
}

.folder-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
  position: relative;
}

.folder-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.folder-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
}

.folder-card-path {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  font-family: 'Consolas', monospace;
}

.folder-card-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  position: relative;
}

.folder-detail {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  display: none;
}

.folder-detail ul {
  padding-left: 16px;
}

.folder-detail li {
  margin-bottom: 4px;
}

.folder-card.active .folder-detail {
  display: block;
}

/* ============================================================
   フローチャートセクション
   ============================================================ */
#flowchart {
  background: var(--color-bg);
}

.flow-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0;
}

.flow-tab {
  padding: 10px 20px;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
  font-family: var(--font-main);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.flow-tab:hover {
  color: var(--color-text);
}

.flow-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.flow-panel {
  display: none;
}

.flow-panel.active {
  display: block;
}

.mermaid-wrapper {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  overflow-x: auto;
  backdrop-filter: blur(8px);
  cursor: zoom-in;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.mermaid-wrapper:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.2);
}

/* Mermaid 図のカスタムスタイル */
.mermaid svg {
  max-width: 100%;
  height: auto;
}

.flow-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
   シーケンス図セクション
   ============================================================ */
#sequence {
  background: var(--color-bg2);
}

.seq-explainer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.seq-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.seq-step {
  display: flex;
  gap: 20px;
  cursor: pointer;
  padding: 16px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.seq-step:hover {
  background: var(--color-surface);
}

.seq-step.active {
  background: var(--color-surface2);
}

.seq-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-surface2);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim);
  flex-shrink: 0;
  transition: all var(--transition);
}

.seq-step.active .seq-step-num {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 16px var(--color-primary-glow);
}

/* seq-step-body は追加スタイル不要のためルール省略 */


.seq-step-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.seq-step-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ============================================================
   設計哲学「な・ど・し・り・さ」セクション
   ============================================================ */
#philosophy {
  background: var(--color-bg);
}

.philosophy-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.phil-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.phil-card::after {
  content: attr(data-kana);
  position: absolute;
  bottom: -20px;
  right: -10px;
  font-size: 6rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  pointer-events: none;
}

.phil-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.2);
}

.phil-kana {
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 12px;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.phil-keyword {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.phil-desc {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   まとめ / CTAセクション
   ============================================================ */
#summary {
  background: var(--color-bg2);
  text-align: center;
}

.summary-card {
  max-width: 680px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  padding: 56px 40px;
  backdrop-filter: blur(16px);
}

.summary-card h2 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.summary-card p {
  color: var(--color-text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}

/* ============================================================
   ファイルサンプルセクション
   ============================================================ */
#samples {
  background: var(--color-bg2);
}

/* ファイルタブバー（エディタ風） */
.sample-tabs {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
  scrollbar-width: none;
}

.sample-tabs::-webkit-scrollbar {
  display: none;
}

.sample-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: transparent;
  border: none;
  color: var(--color-text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all var(--transition);
  font-family: var(--font-main);
  border-right: 1px solid var(--color-border);
}

.sample-tab:first-child {
  border-left: 1px solid var(--color-border);
}

.sample-tab:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.sample-tab.active {
  color: var(--color-secondary);
  background: var(--color-surface);
  border-bottom-color: var(--color-secondary);
}

.sample-tab .file-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* コードビューア本体 */
.sample-viewer {
  background: #0d1117;
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
  position: relative;
}

/* "サンプル" バナー */
.sample-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(245, 158, 11, 0.1);
  border-bottom: 1px solid rgba(245, 158, 11, 0.25);
  font-size: 0.78rem;
  color: var(--color-warning);
}

.sample-banner strong {
  font-weight: 700;
}

/* コードパネル */
.sample-panel {
  display: none;
}

.sample-panel.active {
  display: block;
}

/* 行番号付きコードブロック */
.code-block {
  display: flex;
  overflow-x: auto;
  padding: 24px 0;
}

.line-numbers {
  padding: 0 16px;
  color: #3d4f5c;
  font-size: 0.78rem;
  line-height: 1.9;
  font-family: 'Consolas', 'Monaco', monospace;
  text-align: right;
  user-select: none;
  border-right: 1px solid #1e2a35;
  min-width: 44px;
  flex-shrink: 0;
}

.code-content {
  padding: 0 24px;
  font-size: 0.78rem;
  line-height: 1.9;
  font-family: 'Consolas', 'Monaco', monospace;
  color: #c9d1d9;
  white-space: pre;
  flex: 1;
  overflow-x: visible;
}

/* シンタックスカラー（Markdown風） */
.c-h1 {
  color: #79c0ff;
  font-weight: 700;
}

/* # 見出し */
.c-h2 {
  color: #7ee787;
  font-weight: 700;
}

/* ## 見出し */
.c-h3 {
  color: #d2a8ff;
  font-weight: 600;
}

/* ### 見出し */
.c-bold {
  color: #ffa657;
  font-weight: 700;
}

/* **太字** */
.c-code {
  color: #ff7b72;
}

/* `コード` */
.c-mute {
  color: #6e7681;
  font-style: italic;
}

/* コメント行 */
.c-list {
  color: #3fb950;
}

/* - リスト */
.c-key {
  color: #d2a8ff;
}

/* キーワード */

/* ステータスバー */
.sample-statusbar {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 6px 20px;
  background: #161b22;
  border-top: 1px solid #1e2a35;
  font-size: 0.7rem;
  color: #6e7681;
}

.sample-statusbar span {
  display: flex;
  align-items: center;
  gap: 5px;
}

@media (max-width: 768px) {
  .sample-tab {
    padding: 10px 14px;
    font-size: 0.75rem;
  }

  .code-content {
    font-size: 0.72rem;
  }
}

/* ============================================================
   モーダル (画像拡大表示用)
   ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(8px);
  cursor: zoom-out;
}

.modal-content {
  position: relative;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  width: 90vw;
  max-width: 1200px;
  max-height: 90vh;
  overflow: auto;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  z-index: 10001;
  transition: color var(--transition), transform var(--transition);
}

.modal-close:hover {
  color: #fff;
  transform: scale(1.2);
}

.modal-body {
  width: 100%;
  display: flex;
  justify-content: center;
}

.modal-body .mermaid svg {
  max-width: 100%;
  height: auto;
}

/* ============================================================
   フッター
   ============================================================ */
footer {
  position: relative;
  z-index: 1;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 32px;
  text-align: center;
  color: var(--color-text-dim);
  font-size: 0.8rem;
}

footer a {
  color: var(--color-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* ============================================================
   ユーティリティ
   ============================================================ */
.gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  border: 1px solid;
}

.tag-info {
  color: var(--color-secondary);
  border-color: rgba(6, 182, 212, 0.4);
  background: rgba(6, 182, 212, 0.08);
}

.tag-warning {
  color: var(--color-warning);
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.08);
}

.tag-accent {
  color: var(--color-accent);
  border-color: rgba(167, 139, 250, 0.4);
  background: rgba(167, 139, 250, 0.08);
}

/* ============================================================
   レスポンシブ (スマホ対応)
   ============================================================ */
@media (max-width: 768px) {
  section {
    padding: 72px 20px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-visual {
    display: none;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.97);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
    gap: 16px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
  }

  #nav-hamburger {
    display: flex;
  }

  .seq-explainer {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .structure-grid {
    grid-template-columns: 1fr;
  }

  .philosophy-cards {
    grid-template-columns: 1fr 1fr;
  }

  .summary-card {
    padding: 36px 24px;
  }

  #navbar {
    padding: 0 20px;
  }
}

@media (max-width: 480px) {
  .philosophy-cards {
    grid-template-columns: 1fr;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .flow-tabs {
    overflow-x: auto;
    padding-bottom: 4px;
  }
}