/* ==============================
   174° — 共通スタイル
   ============================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=Zen+Kaku+Gothic+New:wght@400;700&family=Noto+Sans+JP:wght@400;500&display=swap');

/* ==============================
   CSS変数
   ============================== */
:root {
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-primary: #7C6FAF;
  --color-primary-light: #EDE9F8;
  --color-primary-dark: #5A4F8A;
  --color-accent: #E8A598;
  --color-text: #2C2C2C;
  --color-text-muted: #888888;
  --color-border: #E8E4F0;
  --color-success: #7DBF9E;
  --color-warning: #E8C87A;
  --color-danger: #D97B7B;
  --shadow-soft: 0 4px 24px rgba(124, 111, 175, 0.10);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --nav-height: 68px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1A1820;
    --color-surface: #241F2E;
    --color-text: #EDE9F8;
    --color-border: #3A3450;
    --color-text-muted: #9A96A8;
    --shadow-card: 0 2px 12px rgba(0,0,0,0.3);
  }
}

/* 手動テーマオーバーライド（システム設定より高優先） */
:root[data-theme="dark"] {
  --color-bg: #1A1820;
  --color-surface: #241F2E;
  --color-text: #EDE9F8;
  --color-border: #3A3450;
  --color-text-muted: #9A96A8;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.3);
}
:root[data-theme="light"] {
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-text: #2C2C2C;
  --color-border: #E8E4F0;
  --color-text-muted: #888888;
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 400;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  overflow-x: hidden;
}

/* フェードイン */
body {
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ==============================
   タイポグラフィ
   ============================== */
h1, h2, h3 {
  font-family: 'Zen Kaku Gothic New', sans-serif;
  font-weight: 700;
  line-height: 1.3;
}

.brand {
  font-family: 'DM Serif Display', serif;
  font-weight: 400;
}

/* ==============================
   レイアウト
   ============================== */
.page {
  padding: 0 0 calc(var(--nav-height) + 16px) 0;
  min-height: 100vh;
}

.container {
  padding: 0 16px;
}

/* ==============================
   ヘッダー
   ============================== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 12px;
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

.app-header .logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1.5rem;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.app-header .header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:active {
  transform: scale(0.92);
  background: var(--color-border);
}

/* ==============================
   ボトムナビ
   ============================== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  height: var(--nav-height);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 200;
  padding-bottom: env(safe-area-inset-bottom, 0);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.65rem;
  font-family: 'Noto Sans JP', sans-serif;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  transition: color 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.nav-item .nav-icon {
  font-size: 1.3rem;
  line-height: 1;
}
.nav-item.active {
  color: var(--color-primary);
}
.nav-item.active .nav-icon {
  filter: drop-shadow(0 0 6px rgba(124,111,175,0.4));
}

/* 中央の記録ボタン */
.nav-item.nav-record {
  width: 62px;
  height: 62px;
  background: var(--color-primary);
  border-radius: 50%;
  color: #fff;
  font-size: 0.7rem;
  box-shadow: 0 4px 16px rgba(124,111,175,0.45);
  margin-bottom: 12px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.nav-item.nav-record .nav-icon {
  font-size: 1.5rem;
}
.nav-item.nav-record:active {
  transform: scale(0.93);
  box-shadow: 0 2px 8px rgba(124,111,175,0.3);
}

/* ==============================
   カード
   ============================== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  margin-bottom: 12px;
}

.card-sm {
  padding: 14px 16px;
}

/* ==============================
   ボタン
   ============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s, opacity 0.12s;
  -webkit-tap-highlight-color: transparent;
  text-decoration: none;
  min-height: 52px;
  width: 100%;
}
.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,111,175,0.35);
}
.btn-primary:active {
  box-shadow: 0 2px 6px rgba(124,111,175,0.2);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-ghost {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 0.875rem;
  min-height: 44px;
}

/* ==============================
   タグ・チップ
   ============================== */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border-radius: 100px;
  font-size: 0.875rem;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.15s;
  min-height: 44px;
  -webkit-tap-highlight-color: transparent;
  font-family: 'Noto Sans JP', sans-serif;
}
.tag:active {
  transform: scale(0.96);
}
.tag.selected {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  font-weight: 500;
}

/* ==============================
   バッジ
   ============================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
}
.badge-stable   { background: #E0F0FF; color: #3A7FBD; }
.badge-warning  { background: #FFF5D6; color: #B07D00; }
.badge-danger   { background: #FFE8E8; color: #C04A4A; }
.badge-success  { background: #E4F5EC; color: #3A8A5B; }

/* ==============================
   セクションタイトル
   ============================== */
.section-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

/* ==============================
   トグルスイッチ
   ============================== */
.toggle-switch {
  position: relative;
  width: 48px;
  height: 28px;
  flex-shrink: 0;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  left: 3px;
  top: 3px;
  transition: transform 0.2s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.toggle-switch input:checked + .toggle-slider {
  background: var(--color-primary);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ==============================
   フォーム要素
   ============================== */
.form-group {
  margin-bottom: 16px;
}
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color 0.15s;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
}
.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* ==============================
   ユーティリティ
   ============================== */
.mt-8  { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }

.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); font-size: 0.875rem; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8        { gap: 8px; }
.gap-12       { gap: 12px; }

.divider {
  height: 1px;
  background: var(--color-border);
  margin: 16px 0;
}

/* ==============================
   AIカード
   ============================== */
.ai-card {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #F8F4FF 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
  margin-bottom: 12px;
}
.ai-card::before {
  content: '✨';
  position: absolute;
  right: 16px;
  top: 14px;
  font-size: 1.2rem;
  opacity: 0.6;
}
.ai-card .ai-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}
.ai-card .ai-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text);
}

@media (prefers-color-scheme: dark) {
  .ai-card {
    background: linear-gradient(135deg, #2D2640 0%, #1E1A2E 100%);
  }
}

/* ==============================
   ページタイトル
   ============================== */
.page-title-bar {
  padding: 20px 20px 4px;
}
.page-title-bar h1 {
  font-size: 1.4rem;
  color: var(--color-text);
}
.page-title-bar .subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

/* ==============================
   デスクトップ対応
   ============================== */
@media (min-width: 480px) {
  .bottom-nav {
    border-radius: 0;
  }
}