/* ═══════════════════════════════════════════════
   Email Router — design system
   Light / dark via [data-theme], falls back to system
   ═══════════════════════════════════════════════ */

:root {
  color-scheme: light dark;

  /* light theme (default) */
  --bg: #f5f5f7;
  --bg-raised: #ffffff;
  --bg-hover: #f0f0f3;
  --bg-input: #ffffff;
  --bg-inset: #f7f7f9;
  --border: #e3e3e8;
  --border-strong: #c9c9d1;
  --text: #1b1b22;
  --text-dim: #5f5f6b;
  --text-muted: #9a9aa5;
  --accent: #6d28d9;
  --accent-strong: #5b21b6;
  --accent-soft: rgba(109, 40, 217, 0.09);
  --on-accent: #ffffff;
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.08);
  --success: #16a34a;
  --success-soft: rgba(22, 163, 74, 0.1);
  --overlay: rgba(20, 20, 26, 0.45);
  --shadow-sm: 0 1px 2px rgba(15, 15, 20, 0.05);
  --shadow-md: 0 4px 16px rgba(15, 15, 20, 0.09);
  --shadow-lg: 0 12px 40px rgba(15, 15, 20, 0.18);
  --skeleton-base: #ececf0;
  --skeleton-sheen: #f8f8fa;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Berkeley Mono", "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-full: 999px;
  --t: 150ms ease;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e0e11;
  --bg-raised: #17171c;
  --bg-hover: #1e1e24;
  --bg-input: #101014;
  --bg-inset: #121217;
  --border: #27272e;
  --border-strong: #3f3f49;
  --text: #e6e6ea;
  --text-dim: #9c9ca6;
  --text-muted: #63636e;
  --accent: #a78bfa;
  --accent-strong: #b8a1fb;
  --accent-soft: rgba(167, 139, 250, 0.13);
  --on-accent: #16121f;
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.1);
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.12);
  --overlay: rgba(0, 0, 0, 0.6);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --skeleton-base: #1e1e24;
  --skeleton-sheen: #2a2a32;
}

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

html { height: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--t), color var(--t);
}

button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input { font: inherit; color: inherit; }
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 5px;
  border-radius: 4px;
}

.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}
.mono { font-family: var(--font-mono); font-size: 12.5px; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text-dim);
  transition: background-color var(--t), color var(--t), border-color var(--t), opacity var(--t);
  white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); color: var(--text); border-color: var(--border-strong); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:disabled:hover { background: var(--bg-raised); color: var(--text-dim); border-color: var(--border); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--on-accent); }

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { background: var(--danger); border-color: var(--danger); color: #fff; opacity: 0.88; }

.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { border-color: transparent; }

.btn-sm { padding: 6px 13px; font-size: 12.5px; }
.btn-block { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  color: var(--text-dim);
  transition: background-color var(--t), color var(--t);
  flex: none;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.icon-btn svg { width: 16px; height: 16px; }
.icon-btn.danger:hover { background: var(--danger-soft); color: var(--danger); }
.icon-btn.spinning svg { animation: spin 700ms linear infinite; }

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

.spinner {
  width: 15px;
  height: 15px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
  flex: none;
}

/* ── Inputs ── */
input[type="text"], input[type="email"], input[type="password"], input[type="search"] {
  width: 100%;
  font-size: 13.5px;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--t), box-shadow var(--t), background-color var(--t);
}
input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
input::placeholder { color: var(--text-muted); }
input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; }

textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text);
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  resize: vertical;
  min-height: 90px;
  transition: border-color var(--t), box-shadow var(--t);
}
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
textarea::placeholder { color: var(--text-muted); font-family: var(--font-mono); }

select {
  width: 100%;
  font: inherit;
  font-size: 13.5px;
  color: var(--text);
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--t), box-shadow var(--t);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23909099' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 14px;
  cursor: pointer;
}
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 6px;
}

/* ── Login ── */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}
.login-box {
  width: 100%;
  max-width: 380px;
  padding: 40px 36px 32px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.login-brand { text-align: center; margin-bottom: 28px; }
.login-brand .brand-mark {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: 12px;
}
.login-title { font-size: 20px; font-weight: 650; letter-spacing: -0.02em; }
.login-hint { color: var(--text-muted); font-size: 13px; margin-top: 2px; }

.token-field { position: relative; margin-bottom: 14px; }
.token-field input { padding-right: 42px; font-family: var(--font-mono); font-size: 13px; }
.token-field .icon-btn {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
}

.login-error {
  color: var(--danger);
  font-size: 12.5px;
  margin-top: 14px;
  text-align: center;
}
.login-box.shake { animation: shake 400ms ease; }
@keyframes shake {
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

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

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 14px 24px 6px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 22px; height: 22px; color: var(--accent); flex: none; }
.brand-name { font-size: 15px; font-weight: 650; letter-spacing: -0.01em; }
.header-actions { display: flex; align-items: center; gap: 6px; }

.tabs {
  display: flex;
  gap: 4px;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  overflow-x: auto;
}
.tab {
  padding: 10px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--t);
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 24px 48px;
}

.tab-panel[hidden] { display: none; }

/* ── Toolbar ── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.toolbar-spacer { flex: 1; }
.count-label { font-size: 12.5px; color: var(--text-muted); white-space: nowrap; }

.search {
  position: relative;
  width: 300px;
  max-width: 100%;
}
.search svg {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  color: var(--text-muted);
  pointer-events: none;
}
.search input { padding-left: 34px; }

/* ── Panel & tables ── */
.panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.table-scroll { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.data-table thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg-inset);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table tbody td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr { transition: background-color var(--t); }
.data-table tbody tr:hover { background: var(--bg-hover); }

tr.clickable { cursor: pointer; }
tr.clickable:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.th-time, .cell-time { white-space: nowrap; }
.th-actions { width: 44px; }
.th-switch { width: 60px; }
.cell-time time { color: var(--text-dim); font-size: 12.5px; }
.cell-actions { text-align: right; }

.cell-from {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cell-subject {
  max-width: 340px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cell-subject .subject-text { vertical-align: middle; }

/* prefix chip */
.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 9px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* verification code chip */
.code-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--success);
  background: var(--success-soft);
  padding: 2px 8px;
  margin-left: 8px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  vertical-align: middle;
  transition: opacity var(--t);
}
.code-chip:hover { opacity: 0.75; }
.code-chip svg { width: 11px; height: 11px; }

/* ── Switch ── */
.switch { position: relative; display: inline-block; width: 34px; height: 20px; cursor: pointer; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch-track {
  position: absolute;
  inset: 0;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  transition: background-color var(--t);
}
.switch-track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0,0,0,0.25);
  transition: transform var(--t);
}
.switch input:checked + .switch-track { background: var(--accent); }
.switch input:checked + .switch-track::after { transform: translateX(14px); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }
.switch input:disabled + .switch-track { opacity: 0.5; }

/* ── Panel states (empty / error / skeleton host) ── */
.panel-state {
  padding: 56px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13.5px;
}
.panel-state svg { width: 36px; height: 36px; margin-bottom: 12px; opacity: 0.55; }
.panel-state .state-title { display: block; font-weight: 500; color: var(--text-dim); }
.panel-state .state-sub { display: block; font-size: 12.5px; margin-top: 3px; }
.panel-state .btn { margin-top: 16px; }

/* skeleton */
.skeleton {
  display: inline-block;
  height: 13px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--skeleton-base) 25%, var(--skeleton-sheen) 45%, var(--skeleton-base) 65%);
  background-size: 200% 100%;
  animation: shimmer 1.3s linear infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 16px;
}
.pagination[hidden] { display: none; }
.page-info { font-size: 12.5px; color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* ── Rule forms ── */
.rule-form {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 18px;
  margin-bottom: 10px;
}
.rule-form .field { flex: 1; min-width: 0; }
.rule-form .btn { flex: none; }

.form-hint {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0 4px 16px;
}

/* ── Settings ── */
.settings-stack {
  display: grid;
  gap: 16px;
  max-width: 560px;
}

.settings-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 3px;
}

.card-actions {
  display: flex;
  justify-content: flex-end;
}

.settings-card .field[hidden] { display: none; }

.field-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.field-stack[hidden] { display: none; }

.card-actions { gap: 10px; }
.card-actions .push-left { margin-right: auto; }

/* ── Playground ── */
.playground-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.pg-placeholder {
  padding: 40px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 12.5px;
  line-height: 1.7;
}

#pg-result { display: flex; flex-direction: column; gap: 14px; }

.pg-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.pg-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pg-list-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  padding: 7px 10px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.pg-list-item .arrow { color: var(--text-muted); }

.pg-none {
  font-size: 12.5px;
  color: var(--text-muted);
  padding: 2px 1px;
}

.pg-error {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--danger);
  background: var(--danger-soft);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  border-radius: var(--radius);
  padding: 10px 14px;
  word-break: break-word;
}

.pg-ai-meta {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 6px;
  font-family: var(--font-mono);
}

.pg-body {
  max-height: 260px;
  overflow-y: auto;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
}

@media (max-width: 900px) {
  .playground-grid { grid-template-columns: 1fr; }
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--overlay);
  opacity: 0;
  transition: opacity 180ms ease;
}
.modal-overlay.open { opacity: 1; }

.modal {
  width: 100%;
  max-width: 640px;
  max-height: min(80vh, 720px);
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: translateY(10px) scale(0.98);
  transition: transform 180ms ease;
}
.modal-overlay.open .modal { transform: none; }
.modal.modal-sm { max-width: 400px; }

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px 0;
}
.modal-title {
  flex: 1;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.45;
  word-break: break-word;
}
.modal-body { padding: 14px 20px 20px; overflow-y: auto; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}

.modal-text { font-size: 13.5px; color: var(--text-dim); }

/* email detail */
.detail-meta {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 5px 14px;
  font-size: 12.5px;
  padding: 12px 14px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
}
.detail-meta dt { color: var(--text-muted); white-space: nowrap; }
.detail-meta dd { font-family: var(--font-mono); font-size: 12px; word-break: break-all; }

.code-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--success-soft);
  border: 1px solid color-mix(in srgb, var(--success) 30%, transparent);
  border-radius: var(--radius);
  margin-bottom: 14px;
  font-size: 13px;
}
.code-banner .code-value {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--success);
}
.code-banner .btn { margin-left: auto; }

.detail-body {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-dim);
  padding: 2px 2px 6px;
}

/* ── Toasts ── */
#toast-root {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 9px;
  max-width: 340px;
  padding: 10px 15px;
  font-size: 13px;
  background: var(--bg-raised);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 200ms ease, transform 200ms ease;
}
.toast.show { opacity: 1; transform: none; }
.toast svg { width: 15px; height: 15px; flex: none; }
.toast-success svg { color: var(--success); }
.toast-error svg { color: var(--danger); }

/* ── Responsive ── */
@media (max-width: 720px) {
  .header-inner { padding: 12px 16px 4px; }
  .tabs { padding: 0 16px; }
  .main { padding: 16px 16px 40px; }

  .toolbar { flex-wrap: wrap; }
  .search { width: 100%; order: 1; }
  .toolbar-spacer { display: none; }
  .count-label { flex: 1; }

  .rule-form { flex-direction: column; align-items: stretch; }

  /* tables → cards */
  .data-table thead { display: none; }
  .data-table, .data-table tbody, .data-table tr, .data-table td { display: block; }
  .data-table tbody tr {
    position: relative;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
  }
  .data-table tbody tr:last-child { border-bottom: none; }
  .data-table tbody td { padding: 2px 0; border: none; }
  .data-table td[data-label]::before {
    content: attr(data-label);
    display: inline-block;
    width: 68px;
    font-size: 11.5px;
    color: var(--text-muted);
  }
  .cell-from, .cell-subject { max-width: none; white-space: normal; }
  .cell-actions {
    position: absolute;
    top: 8px;
    right: 10px;
    padding: 0;
  }

  .modal-overlay { padding: 0; align-items: flex-end; }
  .modal { max-width: none; max-height: 88vh; border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .modal.modal-sm { max-width: none; }

  #toast-root { left: 16px; right: 16px; bottom: 16px; align-items: stretch; }
  .toast { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}