/* ========================================================
   結び Musubi URL Shortener — 日式極簡核心設計系統
   Japanese Minimalist & Wabi-Sabi Design System
   ======================================================== */

:root {
  --bg-washi: #FAF8F5;
  --bg-washi-subtle: #F3EFEA;
  --bg-card: #FFFFFF;
  --text-sumi: #1A1918;
  --text-charcoal: #383531;
  --text-muted: #7A746B;
  --text-faint: #A6A095;
  --border-line: #E6E2D8;
  --border-dark: #C9C4B7;
  --accent-shu: #C23E2A; /* 朱印朱紅 */
  --accent-shu-hover: #A83321;
  --accent-shu-subtle: #FBF0ED;
  --accent-matcha: #3F5E4D; /* 抹茶綠 */
  --accent-indigo: #2D3E4E; /* 藍染深青 */
  --font-serif: "Shippori Mincho", "Noto Serif TC", "Noto Serif JP", serif;
  --font-sans: "Zen Kaku Gothic New", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --shadow-subtle: 0 4px 20px rgba(28, 26, 24, 0.04);
  --shadow-hover: 0 8px 30px rgba(28, 26, 24, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-washi);
  color: var(--text-sumi);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  position: relative;
  min-height: 100vh;
}

/* 和紙微質感紋理 (CSS Pattern) */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(26, 25, 24, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: -1;
}

/* 容器與版面佈局 */
.zen-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 頂部導航 */
.zen-navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--border-line);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-sumi);
  transition: opacity 0.2s ease;
}

.brand-link:hover {
  opacity: 0.85;
}

/* 日式朱印 (Hanko Seal) */
.hanko-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--accent-shu);
  color: var(--accent-shu);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 4px;
  position: relative;
  background: var(--accent-shu-subtle);
  transform: rotate(-1deg);
  box-shadow: 0 1px 3px rgba(194, 62, 42, 0.15);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-sumi);
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  text-decoration: none;
  color: var(--text-charcoal);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  transition: color 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--accent-shu);
}

.nav-link-admin {
  padding: 6px 14px;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}

.nav-link-admin:hover {
  border-color: var(--accent-shu);
  color: var(--accent-shu);
}

/* A-ADS 廣告框架樣式 (和風融合) */
.aads-banner-container {
  margin: 32px 0;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.aads-banner-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border-line);
}

.aads-tag {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  border: 1px solid var(--border-line);
  padding: 2px 6px;
  border-radius: 2px;
  background: var(--bg-washi-subtle);
}

.aads-provider {
  font-size: 0.72rem;
  color: var(--text-faint);
  letter-spacing: 0.05em;
}

.aads-frame-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* 核心區域 Hero */
.zen-hero {
  text-align: center;
  padding: 56px 0 36px;
}

.zen-hero-tag {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  color: var(--accent-shu);
  margin-bottom: 16px;
  padding: 4px 12px;
  background: var(--accent-shu-subtle);
  border-radius: 20px;
  border: 1px solid rgba(194, 62, 42, 0.2);
}

.zen-hero-title {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-sumi);
  line-height: 1.35;
  margin-bottom: 14px;
}

.zen-hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 主縮網址卡片 */
.shortener-box {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-subtle);
  margin: 20px 0 40px;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.shortener-box:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-dark);
}

.url-input-wrap {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.url-main-input {
  flex: 1;
  padding: 16px 20px;
  font-size: 1.05rem;
  font-family: var(--font-sans);
  color: var(--text-sumi);
  background: var(--bg-washi);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all 0.2s ease;
}

.url-main-input:focus {
  border-color: var(--accent-shu);
  background: #FFF;
  box-shadow: 0 0 0 3px rgba(194, 62, 42, 0.08);
}

.btn-zen-primary {
  padding: 16px 32px;
  background: var(--accent-shu);
  color: #FFF;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(194, 62, 42, 0.25);
}

.btn-zen-primary:hover {
  background: var(--accent-shu-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(194, 62, 42, 0.3);
}

.btn-zen-primary:active {
  transform: translateY(0);
}

.btn-zen-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-zen-ghost {
  padding: 8px 16px;
  background: transparent;
  color: var(--text-charcoal);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.btn-zen-ghost:hover {
  border-color: var(--text-sumi);
  color: var(--text-sumi);
  background: var(--bg-washi-subtle);
}

/* 進階設定開關 */
.options-toggle-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  margin-top: 4px;
  transition: color 0.2s ease;
}

.options-toggle-btn:hover {
  color: var(--accent-shu);
}

.options-toggle-icon {
  transition: transform 0.2s ease;
  font-size: 0.75rem;
}

.options-toggle-icon.open {
  transform: rotate(90deg);
}

/* 進階選項面板 */
.advanced-options {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--border-line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.option-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.option-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.zen-select, .zen-input-sm {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.92rem;
  font-family: var(--font-sans);
  color: var(--text-sumi);
  background: var(--bg-washi);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.2s ease;
}

.zen-select:focus, .zen-input-sm:focus {
  border-color: var(--accent-shu);
  background: #FFF;
}

/* 結果呈現卡片 (滑順浮現) */
.result-card {
  margin-top: 28px;
  padding: 24px;
  background: var(--bg-washi);
  border: 1px solid var(--border-dark);
  border-left: 4px solid var(--accent-shu);
  border-radius: var(--radius-md);
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.result-tag {
  font-size: 0.78rem;
  color: var(--accent-shu);
  letter-spacing: 0.08em;
  font-weight: 500;
  text-transform: uppercase;
}

.result-url-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #FFF;
  border: 1px solid var(--border-line);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.result-short-url {
  flex: 1;
  font-family: var(--font-sans);
  font-size: 1.18rem;
  font-weight: 500;
  color: var(--accent-indigo);
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.result-short-url:hover {
  text-decoration: underline;
}

.btn-copy {
  padding: 8px 18px;
  background: var(--text-sumi);
  color: #FFF;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-copy:hover {
  background: var(--accent-shu);
}

.btn-copy.copied {
  background: var(--accent-matcha);
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-target-preview {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--text-faint);
  word-break: break-all;
}

/* QR Code 展開框 */
.qr-expand-wrap {
  margin-top: 16px;
  padding: 16px;
  background: #FFF;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.qr-image {
  width: 180px;
  height: 180px;
  border: 1px solid var(--border-line);
  padding: 6px;
  background: #FFF;
}

/* 特色區塊 Features */
.zen-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.2s ease;
}

.feature-card:hover {
  border-color: var(--border-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

.feature-icon-seal {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--accent-shu);
  background: var(--bg-washi);
  margin-bottom: 14px;
  border-radius: 2px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-sumi);
}

.feature-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 常見問題 FAQ */
.zen-faq-section {
  margin: 64px 0 48px;
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 32px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-sumi);
}

.section-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  padding: 18px 22px;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--text-sumi);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question:hover {
  background: var(--bg-washi);
}

.faq-answer {
  padding: 0 22px 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* 頁尾 */
.zen-footer {
  border-top: 1px solid var(--border-line);
  padding: 48px 0 32px;
  margin-top: 64px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-shu);
}

/* 獨立卡片頁面 (例如 404, verify, preview, interstitial) */
.zen-card-page {
  max-width: 540px;
  margin: 60px auto 40px;
}

.zen-card {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-subtle);
  position: relative;
  text-align: center;
}

.zen-card-seal {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 32px;
  height: 32px;
  border: 1px solid var(--accent-shu);
  color: var(--accent-shu);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  background: var(--accent-shu-subtle);
  opacity: 0.8;
}

.zen-card-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-sumi);
}

.zen-card-sub {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.zen-card-body {
  text-align: left;
}

.zen-desc {
  font-size: 0.95rem;
  color: var(--text-charcoal);
  margin-bottom: 20px;
  line-height: 1.7;
}

.zen-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.zen-input {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--text-sumi);
  background: var(--bg-washi);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  outline: none;
}

.zen-input:focus {
  border-color: var(--accent-shu);
  background: #FFF;
}

.error-msg {
  color: var(--accent-shu);
  background: var(--accent-shu-subtle);
  border: 1px solid rgba(194, 62, 42, 0.2);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}

.zen-card-footer {
  text-align: center;
  margin-top: 24px;
}

.zen-footer-simple {
  text-align: center;
  padding: 24px 0;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* 預覽與過渡頁專用 */
.preview-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-line);
  font-size: 0.92rem;
}

.preview-label {
  color: var(--text-muted);
}

.preview-val {
  color: var(--text-sumi);
  font-weight: 500;
}

.code-highlight {
  color: var(--accent-shu);
  font-family: monospace;
  font-size: 1.05rem;
}

.target-url-text {
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-actions {
  margin-top: 16px;
  text-align: center;
}

.interstitial-box {
  text-align: center;
}

.countdown-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-shu);
  font-family: var(--font-serif);
}

.target-card {
  margin: 18px 0;
  padding: 16px;
  background: var(--bg-washi);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  text-align: left;
}

.target-title {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.target-url {
  display: block;
  font-size: 0.95rem;
  color: var(--text-sumi);
  word-break: break-all;
}

.interstitial-action {
  margin-top: 20px;
}

/* 響應式調整 */
@media (max-width: 768px) {
  .url-input-wrap {
    flex-direction: column;
  }
  .btn-zen-primary {
    width: 100%;
  }
  .zen-hero-title {
    font-size: 2rem;
  }
  .shortener-box {
    padding: 24px;
  }
  .nav-links {
    gap: 14px;
  }
  .nav-link {
    font-size: 0.82rem;
  }
}


/* 確保 A-ADS 自適應 iframe 擁有足夠高度展示 */
#aadsTopContainer, #aadsBottomContainer, #aadsFooterContainer {
  margin: 20px 0;
  text-align: center;
}

#aadsTopContainer iframe, #aadsBottomContainer iframe, #aadsFooterContainer iframe, .aads-frame-wrap iframe {
  min-height: 90px !important;
}


/* 多語言下拉選單樣式 */
.lang-dropdown-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hover);
  min-width: 150px;
  z-index: 9999;
  padding: 6px 0;
}

.lang-option-item {
  display: block;
  padding: 8px 16px;
  font-size: 0.85rem;
  color: var(--text-charcoal);
  text-decoration: none;
  transition: all 0.2s ease;
}

.lang-option-item:hover {
  background: var(--bg-washi);
  color: var(--accent-shu);
}

.lang-option-item.active {
  color: var(--accent-shu);
  font-weight: 500;
  background: var(--accent-shu-subtle);
}