/* --- Reset --- */
*, *::before, *::after {
  margin: 0; padding: 0; box-sizing: border-box;
}
[hidden] { display: none !important; }

/* --- Tokens --- */
:root {
  --purple-500: #7c5cad;
  --purple-400: #8a6db7;
  --purple-50: #f4f0fb;
  --purple-100: #e8e0f7;

  --color-primary: var(--purple-500);
  --color-primary-hover: var(--purple-400);
  --color-primary-bg: var(--purple-50);
  --color-primary-ghost: rgba(124,92,173,0.08);

  --color-text-primary: #303133;
  --color-text-regular: #606266;
  --color-text-secondary: #909399;
  --color-text-muted: #c0c4cc;

  --color-bg-page: #f5f7fa;
  --color-bg-card: #ffffff;
  --color-bg-hover: #f0f2f5;

  --color-border: #e4e7ed;
  --color-border-light: #f2f3f5;
  --color-danger: #f56c6c;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI',
               'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Fira Code', 'Consolas', monospace;

  --text-xs: 11px;
  --text-sm: 12px;
  --text-base: 14px;
  --text-md: 16px;
  --text-lg: 20px;
  --text-xl: 24px;

  --weight-medium: 500;
  --weight-semibold: 600;

  --leading-tight: 1.4;
  --leading-normal: 1.6;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;

  --radius-sm: 4px;
  --radius-base: 8px;
  --radius-lg: 10px;
  --radius-2xl: 16px;

  --shadow-card: 0 1px 4px rgba(0,0,0,0.06);
  --shadow-md: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-2xl: 0 20px 60px rgba(0,0,0,0.15);

  --duration-fast: 0.15s;
  --duration-expand: 0.25s;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg-page);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

/* --- Login --- */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.login-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  width: 400px;
  text-align: center;
  box-shadow: var(--shadow-2xl);
}

.login-card h1 {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.login-subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-8);
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.login-card input {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--duration-fast) ease;
  font-family: var(--font-sans);
}

.login-card input:focus { border-color: var(--color-primary); }
.login-card input::placeholder { color: var(--color-text-muted); }

.login-card button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-base);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background var(--duration-fast) ease;
  font-family: var(--font-sans);
}

.login-card button:hover { background: var(--color-primary-hover); }
.login-card button:active { transform: scale(0.97); }

.login-error {
  color: var(--color-danger);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
}

/* --- App --- */
.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Container --- */
.mail-container {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-4);
}

/* --- Controls (sticky top) --- */
.controls {
  display: flex;
  align-items: center;
  padding: var(--space-3) 0;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  background: var(--color-bg-page);
  z-index: 10;
}

.app-title {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  white-space: nowrap;
  margin-right: var(--space-4);
}

.controls-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.search-input,
.recipient-input {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--duration-fast) ease;
  font-family: var(--font-sans);
}

.search-input { width: 160px; }
.recipient-input { width: 120px; }

.search-input:focus,
.recipient-input:focus {
  border-color: var(--color-primary);
}

.search-input::placeholder,
.recipient-input::placeholder { color: var(--color-text-muted); }

.domain-filter {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  outline: none;
  cursor: pointer;
  font-family: var(--font-sans);
}

.email-count {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.icon-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius-base);
  color: var(--color-text-secondary);
  font-size: var(--text-md);
  width: 28px;
  height: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) ease;
}

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

.icon-btn.spinning {
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Email List (card layout) --- */
.email-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* --- Mail Card --- */
.mail-card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  padding: 16px;
  margin-bottom: 8px;
  animation: fadeIn var(--duration-fast) ease;
}

@keyframes fadeIn {
  from { opacity: 0.6; }
  to { opacity: 1; }
}

.card-row-top {
  display: flex;
  align-items: center;
}

.card-sender {
  font-weight: 600;
  font-size: 14px;
  color: #303133;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-time {
  font-size: 11px;
  color: #c0c4cc;
  flex-shrink: 0;
  margin-left: 8px;
}

.card-delete {
  background: none;
  border: none;
  color: #c0c4cc;
  cursor: pointer;
  font-size: 16px;
  padding: 0 0 0 8px;
  line-height: 1;
  transition: color var(--duration-fast) ease;
}

.card-delete:hover {
  color: var(--color-danger);
}

.card-recipient {
  font-size: 11px;
  color: #909399;
  margin: 2px 0 8px;
}

.card-purpose {
  font-size: 14px;
  color: #606266;
  line-height: 1.5;
  margin-bottom: 8px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-badges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}

.badge-money {
  background: #f0fdf4;
  color: #15803d;
  border: 1px solid #bbf7d0;
}

.badge-code {
  background: #fff7ed;
  color: #c2410c;
  border: 1px solid #fed7aa;
}

.badge-default {
  background: #f3f4f6;
  color: #374151;
  border: 1px solid #e5e7eb;
}

.card-expand {
  background: none;
  border: none;
  color: #7c5cad;
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  white-space: nowrap;
  transition: text-decoration var(--duration-fast) ease;
}

.card-expand:hover {
  text-decoration: underline;
}

.card-detail {
  margin-top: 12px;
  border-top: 1px solid #f2f3f5;
}

.card-detail iframe {
  display: block;
  width: 100%;
  min-height: 300px;
  border: none;
}

/* --- Shimmer --- */
@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.shimmer {
  height: 14px;
  border-radius: 4px;
  margin: 4px 0;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite;
}

.shimmer.short {
  width: 60%;
}

/* --- Pagination --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.pagination button {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-regular);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  font-family: var(--font-sans);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination button:disabled { opacity: 0.4; cursor: default; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.18); }

/* --- States --- */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--color-text-muted);
}

.loading {
  text-align: center;
  padding: var(--space-10);
  color: var(--color-text-secondary);
}