:root {
  --bg: #0f1117;
  --bg-secondary: #161822;
  --bg-tertiary: #1c1f2e;
  --surface: #1e2235;
  --surface-hover: #252940;
  --surface-active: #2a2f4a;
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.12);
  --text: #e8eaed;
  --text-secondary: #9aa0b4;
  --text-tertiary: #636980;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-soft: rgba(99,102,241,0.12);
  --primary-glow: rgba(99,102,241,0.25);
  --success: #22c55e;
  --success-soft: rgba(34,197,94,0.12);
  --warning: #f59e0b;
  --warning-soft: rgba(245,158,11,0.12);
  --danger: #ef4444;
  --danger-soft: rgba(239,68,68,0.12);
  --info: #06b6d4;
  --info-soft: rgba(6,182,212,0.12);
  --code-bg: rgba(99,102,241,0.1);
  --code-text: #a5b4fc;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
  --sidebar-width: 260px;
  --header-height: 56px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.hidden { display: none !important; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }
a { color: var(--primary); text-decoration: none; }

/* ========== LOGIN VIEW ========== */
.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.login-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.login-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  animation: orbFloat 20s ease-in-out infinite;
}

.login-bg-orb--1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--primary), transparent 70%);
  top: -200px; left: -100px;
  animation-delay: 0s;
}

.login-bg-orb--2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--info), transparent 70%);
  bottom: -150px; right: -100px;
  animation-delay: -7s;
}

.login-bg-orb--3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--success), transparent 70%);
  top: 50%; left: 60%;
  animation-delay: -14s;
  opacity: 0.2;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

.login-container {
  position: relative;
  width: 100%;
  max-width: 420px;
  padding: 0 20px;
  z-index: 1;
}

.login-brand {
  text-align: center;
  margin-bottom: 36px;
}

.login-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  color: var(--primary);
  margin-bottom: 20px;
}

.login-logo svg { width: 100%; height: 100%; }

.login-brand h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text), var(--primary-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.login-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 6px;
}

.login-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: grid;
  gap: 20px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
}

.login-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.login-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.login-input-icon {
  position: absolute;
  left: 14px;
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.login-input-wrap input {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  padding: 12px 16px 12px 42px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.login-input-wrap input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.login-input-wrap input::placeholder { color: var(--text-tertiary); }

.login-error {
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239,68,68,0.2);
}

.login-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: white;
  font-size: 15px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.login-submit:hover { opacity: 0.92; transform: translateY(-1px); box-shadow: 0 6px 24px var(--primary-glow); }
.login-submit:active { transform: translateY(0); }
.login-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.login-submit-arrow { width: 18px; height: 18px; transition: transform var(--transition); }
.login-submit:hover .login-submit-arrow { transform: translateX(3px); }

.login-footer {
  text-align: center;
  margin-top: 24px;
  color: var(--text-tertiary);
  font-size: 12px;
}

/* ========== DASHBOARD LAYOUT ========== */
.dashboard {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr;
  min-height: 100vh;
}

/* ========== SIDEBAR ========== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  z-index: 100;
  transition: transform var(--transition);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  margin-bottom: 28px;
}

.sidebar-logo {
  width: 36px;
  height: 36px;
  color: var(--primary);
  flex-shrink: 0;
}

.sidebar-logo svg { width: 100%; height: 100%; }

.sidebar-brand-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.sidebar-brand-sub {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}

.sidebar-link svg { width: 20px; height: 20px; flex-shrink: 0; }
.sidebar-link:hover { background: var(--surface); color: var(--text); }
.sidebar-link.active { background: var(--primary-soft); color: var(--primary-hover); font-weight: 600; }

.sidebar-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 10px;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.sidebar-user-avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--primary-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
}

.sidebar-logout {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  transition: background var(--transition), color var(--transition);
}

.sidebar-logout svg { width: 18px; height: 18px; }
.sidebar-logout:hover { background: var(--danger-soft); color: var(--danger); }

/* ========== MOBILE HEADER ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 90;
}

.mobile-menu-btn, .mobile-logout-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
}

.mobile-menu-btn svg, .mobile-logout-btn svg { width: 22px; height: 22px; }

.mobile-brand {
  font-weight: 700;
  font-size: 15px;
}

.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 95;
  backdrop-filter: blur(4px);
}

/* ========== MAIN CONTENT ========== */
.main-content {
  grid-column: 2;
  padding: 28px 32px;
  overflow-y: auto;
  min-height: 100vh;
}

.page { display: none; }
.page.active { display: block; animation: pageIn 300ms ease; }

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

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.page-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ========== COMMON COMPONENTS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
}

.btn svg { width: 16px; height: 16px; }

.btn--primary {
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: white;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.btn--primary:hover { box-shadow: 0 4px 16px var(--primary-glow); transform: translateY(-1px); }
.btn--primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn--outline {
  border: 1px solid var(--border-hover);
  color: var(--text-secondary);
  background: transparent;
}

.btn--outline:hover { border-color: var(--primary); color: var(--primary-hover); background: var(--primary-soft); }
.btn--outline:disabled { opacity: 0.4; cursor: not-allowed; }

.btn--danger {
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.2);
}

.btn--danger:hover { background: rgba(239,68,68,0.2); }

.btn--success {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(34,197,94,0.2);
}

.select-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 14px;
  outline: none;
  cursor: pointer;
  min-width: 160px;
  transition: border-color var(--transition);
}

.select-input:focus { border-color: var(--primary); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  background: var(--surface);
  color: var(--text-secondary);
}

.badge--live {
  background: var(--success-soft);
  color: var(--success);
}

.badge--frozen {
  background: var(--danger-soft);
  color: var(--danger);
}

.badge--active {
  background: var(--success-soft);
  color: var(--success);
}

.badge--default {
  background: var(--primary-soft);
  color: var(--primary-hover);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.card-header h2 {
  font-size: 16px;
  font-weight: 700;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 40px 20px;
  text-align: center;
  color: var(--text-tertiary);
}

.empty-state svg { width: 48px; height: 48px; opacity: 0.3; }
.empty-state p { font-size: 15px; font-weight: 500; color: var(--text-secondary); }
.empty-state span { font-size: 13px; }

/* ========== STATS GRID ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
}

.stat-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg { width: 22px; height: 22px; }

.stat-card--primary .stat-icon { background: var(--primary-soft); color: var(--primary-hover); }
.stat-card--success .stat-icon { background: var(--success-soft); color: var(--success); }
.stat-card--warning .stat-icon { background: var(--warning-soft); color: var(--warning); }
.stat-card--info .stat-icon { background: var(--info-soft); color: var(--info); }

.stat-value {
  font-size: 24px;
  font-weight: 800;
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ========== OVERVIEW GRID ========== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 16px;
}

.recent-codes-list { display: flex; flex-direction: column; gap: 8px; max-height: 480px; overflow-y: auto; }

.recent-code-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
  cursor: pointer;
}

.recent-code-item:hover { border-color: var(--border-hover); }

.recent-code-address {
  font-size: 13px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.recent-code-value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  cursor: copy;
  flex-shrink: 0;
  transition: background var(--transition);
}

.recent-code-value:hover { background: rgba(99,102,241,0.2); }

.recent-code-time {
  font-size: 11px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.recent-code-tenant {
  font-size: 11px;
  color: var(--text-tertiary);
  background: var(--surface);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ========== QUICK ACTIONS ========== */
.quick-actions-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
}

.action-btn svg { width: 20px; height: 20px; flex-shrink: 0; }

.action-btn--primary {
  background: var(--primary-soft);
  color: var(--primary-hover);
  border: 1px solid rgba(99,102,241,0.15);
}

.action-btn--primary:hover { background: rgba(99,102,241,0.2); transform: translateX(4px); }
.action-btn--primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.action-btn--secondary {
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.action-btn--secondary:hover { border-color: var(--border-hover); color: var(--text); transform: translateX(4px); }
.action-btn--secondary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.quick-tenant-wrap {
  padding: 14px 18px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.quick-tenant-wrap label {
  display: block;
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.quick-tenant-wrap .select-input { width: 100%; }
.domain-select-wrap { min-width: 220px; }
.page-header-actions .domain-select-wrap { min-width: 220px; }

/* ========== MAILBOX PAGE ========== */
.mailbox-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.search-wrap {
  position: relative;
  flex: 1;
  max-width: 480px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  padding: 11px 16px 11px 40px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search-input::placeholder { color: var(--text-tertiary); }

.mailbox-count-info {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.mailbox-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 16px;
  min-height: 600px;
}

.mailbox-list-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

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

.mailbox-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  background: var(--bg-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
}

.mailbox-item:hover { background: var(--surface-hover); border-color: var(--border-hover); }
.mailbox-item.active { background: var(--primary-soft); border-color: rgba(99,102,241,0.3); }

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

.mailbox-item-address {
  font-size: 13px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: copy;
  flex: 1;
  min-width: 0;
}

.mailbox-item-address:hover { color: var(--primary-hover); }

.mailbox-item-time {
  font-size: 11px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.mailbox-item-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 8px;
}

.mailbox-item-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  cursor: copy;
  transition: background var(--transition);
}

.mailbox-item-code:hover { background: rgba(99,102,241,0.2); }
.mailbox-item-code.no-code { color: var(--text-tertiary); background: transparent; cursor: default; }

.mailbox-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-tertiary);
}

.mailbox-item-tenant {
  font-size: 10px;
  background: var(--surface-active);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
}

/* ========== MESSAGE DETAIL ========== */
.message-detail-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

.message-panel-inner { display: flex; flex-direction: column; gap: 12px; }

.message-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}

.message-detail-title {
  font-size: 15px;
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color var(--transition);
}

.message-item:hover { border-color: var(--border-hover); }

.message-item-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}

.message-item-subject {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.message-item-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

.message-item-code {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  cursor: copy;
  flex-shrink: 0;
  transition: background var(--transition);
}

.message-item-code:hover { background: rgba(99,102,241,0.2); }

.message-view-toggle {
  display: flex;
  gap: 4px;
  margin-top: 14px;
}

.view-btn {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.view-btn:hover { color: var(--text-secondary); border-color: var(--border-hover); }
.view-btn.active { background: var(--primary-soft); color: var(--primary-hover); border-color: rgba(99,102,241,0.3); }
.view-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.message-body {
  margin-top: 12px;
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-secondary);
  max-height: 300px;
  overflow-y: auto;
}

.message-html-frame {
  width: 100%;
  min-height: 280px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-top: 12px;
  background: white;
}

/* ========== TENANT PAGE ========== */
.tenant-layout { display: grid; gap: 20px; }

.tenant-form { display: grid; gap: 20px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field--full {
  grid-column: 1 / -1;
}

.form-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-field input {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.form-field input::placeholder { color: var(--text-tertiary); }
.form-field input:disabled { opacity: 0.5; cursor: not-allowed; }

.form-field textarea {
  width: 100%;
  min-height: 132px;
  resize: vertical;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.form-field textarea::placeholder { color: var(--text-tertiary); }

.form-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.form-status {
  font-size: 13px;
  color: var(--text-secondary);
}

.tenant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}

.tenant-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  cursor: pointer;
  transition: all var(--transition);
}

.tenant-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }

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

.tenant-card-name {
  font-size: 16px;
  font-weight: 700;
}

.tenant-card-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.6;
}

.tenant-card-stats {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.tenant-detail-summary {
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== MODAL ========== */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 520px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  animation: modalIn 250ms ease;
  max-height: 90vh;
  overflow-y: auto;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h2 { font-size: 18px; font-weight: 700; }

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 20px;
  color: var(--text-tertiary);
  transition: background var(--transition), color var(--transition);
}

.modal-close:hover { background: var(--surface-hover); color: var(--text); }

/* ========== TOAST ========== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  padding: 12px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(10px) scale(0.95);
  transition: opacity 250ms ease, transform 250ms ease;
  pointer-events: auto;
}

.toast.show { opacity: 1; transform: translateY(0) scale(1); }

.toast--success { border-left: 3px solid var(--success); }
.toast--error { border-left: 3px solid var(--danger); }
.toast--info { border-left: 3px solid var(--primary); }

/* ========== RESPONSIVE ========== */
@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .overview-grid { grid-template-columns: 1fr; }
  .mailbox-layout { grid-template-columns: 1fr; }
  .mailbox-list-panel, .message-detail-panel { max-height: none; }
}

@media (max-width: 768px) {
  .dashboard { grid-template-columns: 1fr; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-header { display: flex; }
  .main-content {
    grid-column: 1;
    padding: 16px;
    padding-top: calc(var(--header-height) + 16px);
  }
  .page-header { flex-direction: column; align-items: stretch; }
  .page-header-actions { flex-direction: column; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
  .mailbox-toolbar { flex-direction: column; align-items: stretch; }
  .search-wrap { max-width: none; }
  .stat-value { font-size: 18px; }
  .page-title { font-size: 22px; }
  .form-actions { flex-direction: column; align-items: stretch; }
  .tenant-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .login-form { padding: 24px 20px; }
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-active); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }