/* CSS 變數定義 - 現代色彩系統與細節設定 */
:root {
  --bg-primary: #08090f;
  --bg-secondary: #0f111a;
  --card-bg: rgba(22, 25, 41, 0.65);
  --card-border: rgba(255, 255, 255, 0.07);
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* 霓虹與漸層配色 */
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #bd00ff;
  --primary-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --secondary-gradient: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --btn-hover-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --danger-color: #ef4444;
  --success-color: #10b981;
  --success-glow: rgba(16, 185, 129, 0.2);
  
  /* 陰影與效果 */
  --card-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  --glass-blur: 24px;
}

/* 全域重設 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  padding: 20px;
}

/* 動態背景光效 (Glow Blobs) */
.bg-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.18;
  pointer-events: none;
  z-index: -2;
  animation: float 20s infinite alternate;
}

.bg-glow-1 {
  background: radial-gradient(circle, var(--accent-blue) 0%, transparent 70%);
  top: -10%;
  left: -10%;
}

.bg-glow-2 {
  background: radial-gradient(circle, var(--accent-purple) 0%, transparent 70%);
  bottom: -10%;
  right: -10%;
  animation-delay: -5s;
}

@keyframes float {
  0% {
    transform: translate(0, 0) scale(1);
  }
  100% {
    transform: translate(80px, 50px) scale(1.15);
  }
}

/* 背景網格效果 */
.bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.007) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.007) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
  z-index: -1;
  pointer-events: none;
}

/* 主容器 */
.container {
  width: 100%;
  max-width: 620px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  z-index: 1;
}

/* Header 樣式 */
.app-header {
  text-align: center;
  margin-bottom: 8px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-cyan);
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.6));
}

.logo-highlight {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-top: 8px;
  font-weight: 300;
}

/* 毛玻璃主卡片 */
.main-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.main-card:hover {
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(79, 172, 254, 0.05);
}

/* 分頁切換器 (Tabs) */
.tabs-header {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  border-bottom: 1px solid var(--card-border);
  padding: 6px;
  gap: 6px;
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 14px 20px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
}

.tab-btn:hover .tab-icon {
  transform: translateY(-2px);
}

.tab-btn.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  position: relative;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.8);
}

/* 分頁內容 */
.tabs-body {
  padding: 28px;
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 分享類型切換 (文件 / 文字) */
.type-switcher {
  display: flex;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 4px;
  margin-bottom: 24px;
}

.type-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.type-btn:hover {
  color: var(--text-secondary);
}

.type-btn.active {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.btn-icon {
  width: 16px;
  height: 16px;
}

/* 拖曳上傳區 (Drop Zone) */
.share-zone {
  display: none;
}

.share-zone.active {
  display: block;
}

.drop-zone {
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: 18px;
  padding: 45px 20px;
  text-align: center;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.12);
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.drop-zone:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.015);
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.05);
}

.drop-zone.dragover {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.05);
  box-shadow: 0 0 25px rgba(0, 242, 254, 0.1);
  transform: scale(0.99);
}

.file-hidden-input {
  display: none;
}

.upload-icon-wrapper {
  margin-bottom: 16px;
  display: inline-block;
  position: relative;
}

.upload-cloud {
  width: 52px;
  height: 52px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.drop-zone:hover .upload-cloud,
.drop-zone.dragover .upload-cloud {
  color: var(--accent-cyan);
  transform: translateY(-4px);
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.4));
}

.drop-zone h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.select-link {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.drop-help {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* 已選擇檔案狀態卡片 */
.file-info-card {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 16px;
  margin-top: 16px;
  gap: 16px;
  animation: slideIn 0.3s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.file-info-card .file-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.file-details {
  flex-grow: 1;
  min-width: 0;
}

.file-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-size {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.remove-file-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.remove-file-btn:hover {
  color: var(--danger-color);
  background: rgba(239, 68, 68, 0.1);
}

.remove-file-btn svg {
  width: 18px;
  height: 18px;
}

/* 文字貼上區 */
.textarea-wrapper {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 14px;
  transition: border-color 0.2s ease;
}

.textarea-wrapper:focus-within {
  border-color: var(--accent-cyan);
}

textarea {
  width: 100%;
  height: 200px;
  background: transparent;
  border: none;
  resize: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.6;
  font-family: inherit;
}

textarea::placeholder {
  color: var(--text-muted);
}

.textarea-footer {
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 10px;
  margin-top: 10px;
}

.char-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 輸入框樣式 */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.input-with-icon {
  position: relative;
}

.input-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color 0.2s ease;
}

input[type="text"], input[type="password"], input[type="number"] {
  width: 100%;
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 1.05rem;
  outline: none;
  transition: all 0.25s ease;
}

.input-with-icon input {
  padding-left: 46px;
}

input[type="text"]:focus, input[type="password"]:focus, input[type="number"]:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.08);
}

input[type="text"]:focus + .input-icon, input[type="number"]:focus + .input-icon {
  color: var(--accent-cyan);
}

/* 特殊樣式的輸入 (分享碼/密碼) */
.monospace {
  font-family: 'JetBrains Mono', monospace;
}

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

.letter-spacing-lg {
  letter-spacing: 0.35em;
  padding-left: calc(16px + 0.35em) !important; /* 抵銷文字置中時右側的 padding */
}

.uppercase {
  text-transform: uppercase;
}

/* 進度條樣式 */
.progress-container {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px;
  margin-top: 16px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

#progress-status {
  color: var(--text-secondary);
}

#progress-percent {
  font-weight: 600;
  color: var(--accent-cyan);
}

.progress-bar-bg {
  height: 6px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--primary-gradient);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
  border-radius: 3px;
  transition: width 0.1s ease;
}

/* 按鈕樣式 */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 28px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: none;
}

.primary-btn {
  background: var(--primary-gradient);
  color: #000000;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(79, 172, 254, 0.2);
}

.primary-btn:hover {
  background: var(--btn-hover-gradient);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 242, 254, 0.4);
}

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

.secondary-btn {
  background: var(--secondary-gradient);
  color: var(--text-primary);
  border: 1px solid var(--card-border);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.w-100 {
  width: 100%;
}

.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-20 { margin-top: 20px; }
.mt-12 { margin-top: 12px; }

/* 生成成功 / 提取結果區域 */
.result-card {
  margin-top: 24px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  border-radius: 18px;
  padding: 24px;
  animation: slideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.result-header {
  text-align: center;
  margin-bottom: 20px;
}

.success-ring {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--success-glow);
  border: 1px solid var(--success-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--success-color);
  animation: scaleUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes scaleUp {
  from { transform: scale(0.6); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.check-icon {
  width: 24px;
  height: 24px;
}

.result-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.result-header p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.credentials-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.credential-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 12px 16px;
}

.cred-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

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

.cred-value {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.highlight-text {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.copy-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.copy-btn.copied {
  background: var(--success-glow);
  color: var(--success-color);
  border-color: var(--success-color);
}

.copy-btn svg {
  width: 18px;
  height: 18px;
}

.text-link-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 16px;
  display: block;
  width: 100%;
  text-align: center;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.text-link-btn:hover {
  color: var(--text-secondary);
}

/* 提取內容結果詳細 */
.result-meta-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 12px;
  margin-bottom: 8px;
}

.badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
}

.badge-text {
  background: rgba(189, 0, 255, 0.15);
  color: #d880ff;
  border: 1px solid rgba(189, 0, 255, 0.3);
}

.badge-file {
  background: rgba(79, 172, 254, 0.15);
  color: #7fc3ff;
  border: 1px solid rgba(79, 172, 254, 0.3);
}

.expiry-time {
  font-size: 0.82rem;
  color: var(--danger-color);
}

.file-download-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
}

.file-icon-large {
  width: 44px;
  height: 44px;
  background: rgba(79, 172, 254, 0.1);
  color: var(--accent-blue);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.file-icon-large svg {
  width: 24px;
  height: 24px;
}

.file-download-info {
  min-width: 0;
}

.file-download-info h4 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-download-info p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* 隱藏與顯示輔助 */
.hidden {
  display: none !important;
}

/* Footer 免責與小提醒 */
.app-footer-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 300;
}

/* Toast 提示通知 */
.toast-container {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: rgba(15, 23, 42, 0.9);
  color: #fff;
  padding: 12px 24px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  pointer-events: auto;
  animation: toastIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards,
             toastOut 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) 2.7s forwards;
}

@keyframes toastIn {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes toastOut {
  from { transform: translateY(0); opacity: 1; }
  to { transform: translateY(-20px); opacity: 0; }
}

/* RWD 響應式調整 */
@media (max-width: 480px) {
  body {
    padding: 12px;
  }
  
  .tabs-body {
    padding: 20px;
  }
  
  .logo {
    font-size: 1.8rem;
  }
  
  .logo-icon {
    width: 28px;
    height: 28px;
  }
  
  .subtitle {
    font-size: 0.88rem;
  }

  .drop-zone {
    padding: 30px 10px;
  }
  
  textarea {
    height: 160px;
  }

  .cred-value {
    font-size: 1.15rem;
  }
}

/* ==========================================================================
   新增會員與我的分享列表樣式
   ========================================================================== */

/* 頂部導覽列 (Nav Bar) */
.nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.auth-nav-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: 10px;
}

.auth-nav-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

/* 使用者下拉選單 (User Menu) */
.user-menu {
  position: relative;
  display: inline-block;
}

.user-trigger-btn {
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.2);
  color: var(--accent-cyan);
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: 10px;
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.2);
}

.user-trigger-btn:hover {
  background: rgba(0, 242, 254, 0.1);
  border-color: rgba(0, 242, 254, 0.4);
}

.dropdown-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: rgba(15, 17, 28, 0.95);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  width: 140px;
  padding: 6px;
  display: none;
  animation: fadeIn 0.2s ease forwards;
}

.user-menu.active .dropdown-menu {
  display: block;
}

.dropdown-menu button {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 10px 12px;
  text-align: left;
  font-size: 0.88rem;
  cursor: pointer;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.dropdown-menu button:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

.dropdown-icon {
  width: 16px;
  height: 16px;
}

/* 會員驗證彈窗 (Auth Modal Overlay) */
.auth-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.auth-modal-overlay:not(.hidden) {
  opacity: 1;
  pointer-events: auto;
}

.auth-modal {
  background: rgba(20, 22, 37, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  width: 90%;
  max-width: 400px;
  padding: 32px 28px;
  position: relative;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
  transform: translateY(20px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-modal-overlay:not(.hidden) .auth-modal {
  transform: translateY(0);
}

.close-auth-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.close-auth-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.close-auth-btn svg {
  width: 20px;
  height: 20px;
}

.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 24px;
  gap: 16px;
}

.auth-tab {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 600;
  padding-bottom: 10px;
  cursor: pointer;
  position: relative;
  transition: color 0.2s ease;
}

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

.auth-tab.active {
  color: var(--text-primary);
}

.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-gradient);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.8);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

/* 我的分享歷史列表 (My Shares) */
.my-shares-section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  animation: fadeIn 0.4s ease forwards;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.section-title .title-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
}

.shares-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 6px;
}

/* 客製化捲軸 */
.shares-list::-webkit-scrollbar {
  width: 4px;
}

.shares-list::-webkit-scrollbar-track {
  background: transparent;
}

.shares-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.shares-list::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 242, 254, 0.3);
}

.share-item-card {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 14px 16px;
  gap: 16px;
  transition: all 0.25s ease;
}

.share-item-card:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(0, 242, 254, 0.2);
  transform: translateY(-1px);
}

.share-item-type {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.share-item-type.file {
  background: rgba(79, 172, 254, 0.1);
  color: var(--accent-blue);
}

.share-item-type.text {
  background: rgba(189, 0, 255, 0.1);
  color: var(--accent-purple);
}

.share-item-type svg {
  width: 18px;
  height: 18px;
}

.share-item-info {
  flex-grow: 1;
  min-width: 0;
}

.share-item-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.share-item-meta {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 4px;
  flex-wrap: wrap;
}

.highlight-cyan {
  color: var(--accent-cyan);
}

.share-item-expiry {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.share-item-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.share-item-actions button,
.share-item-actions a {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  text-decoration: none;
}

.share-item-actions button:hover,
.share-item-actions a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.share-item-actions button.delete-action-btn:hover {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
  border-color: rgba(239, 68, 68, 0.2);
}

.share-item-actions svg {
  width: 16px;
  height: 16px;
}

.shares-list-empty {
  text-align: center;
  padding: 32px 16px;
  color: var(--text-muted);
  font-size: 0.88rem;
  font-weight: 300;
}

/* 管理員自定義權限表單 */
.admin-form {
  background: rgba(0, 0, 0, 0.12);
  border: 1px solid var(--card-border);
  padding: 20px;
  border-radius: 14px;
}

.admin-form-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.flex-1 {
  flex: 1;
  min-width: 200px;
}

.admin-number-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 1.05rem;
  outline: none;
  transition: all 0.25s ease;
}

.admin-number-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.08);
}

.admin-panel-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 18px;
  padding: 24px;
  backdrop-filter: blur(10px);
}

.mb-24 {
  margin-bottom: 24px;
}

.text-cyan {
  color: var(--accent-cyan);
}

.result-link-input {
  flex: 1;
  background: transparent !important;
  border: none !important;
  color: var(--accent-cyan) !important;
  font-family: 'Outfit', sans-serif;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  outline: none;
  font-size: 0.95rem;
  padding: 0 4px;
}

.highlight-cyan {
  color: var(--accent-cyan) !important;
}

/* 銷毀時間選擇器下拉選單 */
.form-select {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  cursor: pointer;
  transition: all 0.25s ease;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

.form-select:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.08);
}

.form-select option {
  background: #11141e;
  color: var(--text-primary);
}

/* 永久空間配額顯示樣式 */
.permanent-quota {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: auto;
  font-weight: 400;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.permanent-quota.hidden {
  display: none !important;
}

/* 語言選擇器樣式 */
.lang-selector {
  position: relative;
  margin-right: 12px;
}

.lang-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.25s ease;
}

.lang-trigger:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-cyan);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: rgba(17, 20, 30, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 120px;
  z-index: 1000;
  box-shadow: var(--neon-shadow);
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.lang-dropdown.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.lang-opt {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.25s ease;
  width: 100%;
}

.lang-opt:hover, .lang-opt.active {
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Advanced Privacy Checkboxes */
.privacy-options-group {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 14px;
}

.checkbox-container {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.checkbox-container:hover {
  color: var(--text-primary);
}

.checkbox-container input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 1px solid var(--card-border);
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  position: relative;
  flex-shrink: 0;
}

.checkbox-container input[type="checkbox"]:checked {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  box-shadow: 0 0 8px rgba(0, 242, 254, 0.25);
}

.checkbox-container input[type="checkbox"]:checked::after {
  content: '✓';
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: bold;
}

.checkbox-container input[type="checkbox"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: rgba(255, 255, 255, 0.02);
}

.checkbox-container.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.checkbox-container.hidden {
  display: none !important;
}

.mt-12 {
  margin-top: 12px;
}

/* Admin Logs Table */
.admin-table {
  width: 100%;
  border-collapse: collapse;
}

.admin-table th {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.admin-table td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  word-break: break-all;
}

.admin-table tbody tr {
  transition: background 0.2s ease;
}

.admin-table tbody tr:hover {
  background: rgba(0, 242, 254, 0.02) !important;
}

.admin-table tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.01);
}

.log-action-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: bold;
}

.log-action-badge.file_upload {
  background: rgba(0, 242, 254, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.3);
}

.log-action-badge.text_upload {
  background: rgba(217, 70, 239, 0.15);
  color: #d946ef;
  border: 1px solid rgba(217, 70, 239, 0.3);
}

/* Footer Styling */
.main-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 16px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-copyright {
  opacity: 0.85;
}

.footer-terms-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  cursor: pointer;
  font-size: 0.8rem;
  text-decoration: underline;
  transition: all 0.2s ease;
  padding: 0;
}

.footer-terms-btn:hover {
  color: #00f2fe;
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.25);
}

.terms-content ul li {
  margin-bottom: 6px;
}