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

:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d26;
  --color-surface-2: #222535;
  --color-border: #2e3147;
  --color-primary: #4f6ef7;
  --color-primary-dark: #3a57d9;
  --color-danger: #e0445e;
  --color-danger-dark: #c43353;
  --color-text: #e4e7f0;
  --color-text-muted: #7c839e;
  --color-accent: #4f6ef7;
  --sidebar-width: 220px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 8px;
  --transition: 0.18s ease;
}

html, body { height: 100%; }
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); font-size: 14px; line-height: 1.5; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius); border: none;
  cursor: pointer; font-size: 13px; font-weight: 500;
  transition: background var(--transition), opacity var(--transition);
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--color-primary-dark); }
.btn-danger  { background: var(--color-danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: var(--color-danger-dark); }
.btn-ghost   { background: transparent; color: var(--color-text-muted); border: 1px solid var(--color-border); }
.btn-ghost:hover:not(:disabled) { background: var(--color-surface-2); color: var(--color-text); }
.btn-full   { width: 100%; justify-content: center; padding: 10px 16px; }
.btn-sm     { padding: 5px 10px; font-size: 12px; }

/* ── Forms ───────────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 12px; color: var(--color-text-muted); font-weight: 500; }
input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-text); padding: 9px 12px; border-radius: var(--radius);
  font-family: var(--font); font-size: 13px; width: 100%;
  transition: border-color var(--transition);
}
input:focus, textarea:focus { outline: none; border-color: var(--color-primary); }
.checkbox-group label { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.checkbox-group input[type=checkbox] { width: 15px; height: 15px; accent-color: var(--color-primary); }

/* ── Utility ─────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.text-muted { color: var(--color-text-muted); font-size: 13px; }
.error-msg { background: rgba(224,68,94,0.12); color: #ff7a8a; border: 1px solid rgba(224,68,94,0.3); padding: 10px 14px; border-radius: var(--radius); font-size: 13px; }
.badge { background: var(--color-primary); color: #fff; font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 999px; min-width: 18px; text-align: center; }
.loading-state { padding: 32px; text-align: center; color: var(--color-text-muted); }
.empty-state   { padding: 48px 32px; text-align: center; color: var(--color-text-muted); }

/* ── Login page ──────────────────────────────────────────────────────── */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 14px; padding: 40px 36px; width: 100%; max-width: 400px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}
.login-logo { color: var(--color-primary); margin-bottom: 16px; }
.login-card h1 { font-size: 22px; font-weight: 700; }
.subtitle { color: var(--color-text-muted); font-size: 13px; margin-bottom: 28px; margin-top: 4px; }

/* ── App layout ──────────────────────────────────────────────────────── */
.app-page { display: flex; height: 100vh; overflow: hidden; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-width); background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex; flex-direction: column; flex-shrink: 0;
}
.sidebar-header {
  display: flex; align-items: center; gap: 10px;
  padding: 20px 16px; font-size: 16px; font-weight: 700;
  color: var(--color-primary); border-bottom: 1px solid var(--color-border);
}
.compose-btn { margin: 16px; }
.sidebar-nav { flex: 1; padding: 8px 8px; display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: var(--radius);
  color: var(--color-text-muted); font-size: 13px; font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.nav-item:hover { background: var(--color-surface-2); color: var(--color-text); text-decoration: none; }
.nav-item.active { background: rgba(79,110,247,0.15); color: var(--color-primary); }
.sidebar-footer { padding: 16px; border-top: 1px solid var(--color-border); }
.user-badge { font-size: 12px; color: var(--color-text-muted); margin-bottom: 6px; word-break: break-all; }
.logout-link { font-size: 12px; color: var(--color-danger); }

/* Main content */
.main-content { flex: 1; display: flex; overflow: hidden; }

/* Mail list panel */
.mail-list-panel { width: 340px; flex-shrink: 0; display: flex; flex-direction: column; border-right: 1px solid var(--color-border); overflow: hidden; }
.panel-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--color-border); font-size: 15px; font-weight: 600; }
.mail-list { flex: 1; overflow-y: auto; }
.mail-item {
  padding: 14px 20px; border-bottom: 1px solid var(--color-border);
  cursor: pointer; transition: background var(--transition);
}
.mail-item:hover { background: var(--color-surface-2); }
.mail-item.active { background: rgba(79,110,247,0.12); border-left: 3px solid var(--color-primary); }
.mail-item-from { font-weight: 600; font-size: 13px; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mail-item-subject { font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 2px; }
.mail-item-date { font-size: 11px; color: var(--color-text-muted); }
.pagination { padding: 12px 20px; display: flex; gap: 8px; justify-content: center; border-top: 1px solid var(--color-border); }

/* Mail view panel */
.mail-view-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.mail-view-content { flex: 1; overflow-y: auto; padding: 28px 36px; }
.mail-view-header { margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--color-border); }
.mail-view-header h2 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.mail-meta-row { display: flex; gap: 10px; font-size: 12px; color: var(--color-text-muted); margin-bottom: 4px; }
.mail-meta-row strong { color: var(--color-text); }
.mail-body { font-size: 14px; line-height: 1.7; white-space: pre-wrap; }
.mail-body iframe { border: none; width: 100%; min-height: 400px; }

/* ── Admin page ──────────────────────────────────────────────────────── */
.admin-main { flex: 1; overflow-y: auto; padding: 28px 36px; }
.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.admin-header h2 { font-size: 20px; font-weight: 700; }
.accounts-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.accounts-table th { text-align: left; padding: 10px 14px; background: var(--color-surface); border-bottom: 2px solid var(--color-border); color: var(--color-text-muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; }
.accounts-table td { padding: 12px 14px; border-bottom: 1px solid var(--color-border); }
.accounts-table tr:hover td { background: var(--color-surface); }
.status-badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.status-active   { background: rgba(72,199,142,0.15); color: #48c78e; }
.status-inactive { background: rgba(224,68,94,0.12); color: #ff7a8a; }
.role-badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.role-admin { background: rgba(79,110,247,0.15); color: var(--color-primary); }
.role-user  { background: var(--color-surface-2); color: var(--color-text-muted); }
.action-btns { display: flex; gap: 6px; }

/* ── Modals ──────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 14px; width: 100%; max-width: 480px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  max-height: 90vh; overflow-y: auto;
}
.modal-sm { max-width: 380px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 22px 8px; }
.modal-header h3 { font-size: 16px; font-weight: 700; }
.modal-body { padding: 16px 22px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; padding: 16px 22px; border-top: 1px solid var(--color-border); }

/* Compose */
.compose-modal { max-width: 560px; }
.compose-field  { background: var(--color-surface-2); border: none; border-bottom: 1px solid var(--color-border); color: var(--color-text); padding: 10px 14px; font-size: 13px; font-family: var(--font); width: 100%; border-radius: 0; }
.compose-field:focus { outline: none; border-bottom-color: var(--color-primary); }
.compose-body { width: 100%; min-height: 240px; resize: vertical; background: transparent; border: none; padding: 14px; font-size: 14px; font-family: var(--font); color: var(--color-text); }
.compose-body:focus { outline: none; }

/* Email input group */
.email-input-group { display: flex; align-items: center; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius); overflow: hidden; }
.email-input-group input { flex: 1; border: none; background: transparent; }
.email-domain { padding: 9px 12px; color: var(--color-text-muted); font-size: 13px; white-space: nowrap; border-left: 1px solid var(--color-border); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }