:root {
  color-scheme: light dark;
  --background: #f4f4f2;
  --surface: #ffffff;
  --surface-muted: #f0f0ed;
  --foreground: #171714;
  --muted: #696963;
  --border: #d9d9d3;
  --primary: #4f46e5;
  --primary-foreground: #ffffff;
  --focus: #6366f1;
  --danger: #b42318;
  --shadow: 0 18px 50px rgb(20 20 18 / 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #11110f;
    --surface: #1b1b18;
    --surface-muted: #242420;
    --foreground: #f3f3ee;
    --muted: #aaa9a1;
    --border: #3a3933;
    --primary: #818cf8;
    --primary-foreground: #11110f;
    --focus: #a5b4fc;
    --danger: #ff8a80;
    --shadow: 0 18px 50px rgb(0 0 0 / 0.24);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font: 15px/1.5 ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, input, textarea { font: inherit; }
button { min-height: 44px; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 48%, transparent);
  outline-offset: 2px;
}

.app-shell { min-height: 100vh; }
.login-card {
  width: min(440px, calc(100% - 32px));
  margin: 10vh auto 0;
  padding: 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 14px;
  background: var(--primary);
  color: var(--primary-foreground);
  font-size: 20px;
  font-weight: 800;
}
.eyebrow { margin: 0 0 4px; color: var(--primary); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(28px, 4vw, 40px); line-height: 1.08; letter-spacing: -.035em; }
h2 { margin: 6px 0 0; font-size: clamp(22px, 3vw, 32px); line-height: 1.15; letter-spacing: -.025em; }
.supporting { color: var(--muted); }
.field-help { margin: 0; color: var(--muted); font-size: 13px; }
.notice {
  margin: 20px 0 0;
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--primary) 38%, var(--border));
  border-radius: 12px;
  background: color-mix(in srgb, var(--primary) 8%, var(--surface));
  color: var(--foreground);
}
.mail-notice { max-width: 1500px; margin: 0 auto 20px; }
.login-card form { display: grid; gap: 10px; margin-top: 26px; }
label { margin-top: 8px; font-weight: 700; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--foreground);
}
input { min-height: 48px; padding: 0 14px; }
select { min-height: 48px; padding: 0 14px; }
textarea { min-height: 150px; padding: 14px; resize: vertical; }
button {
  border: 0;
  border-radius: 12px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 750;
}
button:disabled { cursor: wait; opacity: .6; }
.primary { background: var(--primary); color: var(--primary-foreground); }
.danger { background: var(--danger); color: #fff; }
.secondary { background: var(--surface-muted); color: var(--foreground); border: 1px solid var(--border); }
.quiet { background: transparent; color: var(--muted); }
.error { min-height: 1.5em; margin: 4px 0; color: var(--danger); }
.mail-view { min-height: 100vh; padding: 24px; }
.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  max-width: 1500px;
  margin: 0 auto 20px;
  gap: 20px;
}
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.account { color: var(--muted); margin-inline-end: 8px; }
.workspace-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
  max-width: 1500px;
  margin: 0 auto;
}
.workspace-nav {
  display: flex;
  flex-direction: column;
  align-self: start;
  gap: 4px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.nav-heading { margin: 14px 10px 4px; color: var(--muted); font-size: 11px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: transparent;
  color: var(--muted);
  text-align: start;
}
.nav-item:hover, .nav-item.active { background: var(--surface-muted); color: var(--foreground); }
.workspace-content { min-width: 0; }
.mail-grid {
  display: grid;
  grid-template-columns: minmax(300px, 400px) minmax(0, 1fr);
  min-height: calc(100vh - 136px);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.message-list-panel { min-width: 0; border-inline-end: 1px solid var(--border); background: var(--surface-muted); }
.list-heading { display: flex; min-height: 58px; padding: 0 18px; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border); }
.list-heading p { margin: 0; font-weight: 750; }
.badge { border-radius: 999px; background: var(--primary); color: var(--primary-foreground); padding: 2px 9px; font-size: 12px; font-weight: 800; }
.message-list { max-height: calc(100vh - 195px); overflow: auto; }
.message-row {
  display: block;
  width: 100%;
  min-height: 88px;
  padding: 14px 18px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  color: var(--foreground);
  text-align: start;
}
.message-row:hover, .message-row.active { background: var(--surface); }
.message-row.unread { border-inline-start: 4px solid var(--primary); padding-inline-start: 14px; }
.message-row .row-top { display: flex; gap: 10px; justify-content: space-between; }
.message-row .from { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 750; }
.message-row.unread .from, .message-row.unread .subject { font-weight: 850; }
.message-row time { flex: none; color: var(--muted); font-size: 12px; }
.message-row .subject { margin-top: 5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); }
.reader { min-width: 0; padding: clamp(24px, 4vw, 54px); }
.empty-state { display: grid; min-height: 55vh; place-content: center; text-align: center; color: var(--muted); }
.mail-icon { font-size: 38px; }
.empty-state h2 { color: var(--foreground); }
.reader-header { display: flex; align-items: start; justify-content: space-between; gap: 24px; padding-bottom: 26px; border-bottom: 1px solid var(--border); }
.reader-actions { display: flex; gap: 8px; }
.sender { margin: 0; font-weight: 800; }
.message-body { min-height: 240px; margin: 30px 0; white-space: pre-wrap; overflow-wrap: anywhere; font: 15px/1.7 ui-sans-serif, system-ui, sans-serif; color: var(--foreground); }
.attachments { margin-top: 20px; border-radius: 12px; background: var(--surface-muted); padding: 12px 14px; color: var(--muted); }
.reply-form { border-top: 1px solid var(--border); padding-top: 22px; }
.reply-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
.inline-state { padding: 20px; }
.compose-dialog {
  width: min(680px, calc(100% - 32px));
  max-height: calc(100vh - 32px);
  padding: 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  color: var(--foreground);
  box-shadow: var(--shadow);
}
.compose-dialog::backdrop { background: rgb(10 10 9 / 0.62); }
.compose-dialog form { display: grid; gap: 10px; padding: 28px; }
.compose-header { display: flex; align-items: start; justify-content: space-between; gap: 20px; }
.compose-header h2 { margin-top: 2px; }
#compose-from-field { display: grid; gap: 10px; }
.icon-button { min-width: 44px; padding: 6px 12px; font-size: 28px; line-height: 1; }
.compose-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }
.admin-panel {
  max-width: 920px;
  margin: 24px auto 0;
  padding: 24px;
  border: 1px solid color-mix(in srgb, var(--danger) 45%, var(--border));
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.admin-panel form {
  display: grid;
  gap: 10px;
  max-width: 620px;
  margin-top: 18px;
}
.admin-panel .danger { justify-self: start; margin-top: 8px; }
.content-panel {
  min-height: calc(100vh - 136px);
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.panel-form { display: grid; gap: 8px; max-width: 650px; margin: 24px 0; padding: 20px; border-radius: 14px; background: var(--surface-muted); }
.card-list { display: grid; gap: 10px; margin-top: 22px; }
.management-card { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 16px; border: 1px solid var(--border); border-radius: 14px; }
.management-card h3, .management-card p { margin: 0; }
.user-permissions { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(140px, 200px) auto auto; }
.check-label { display: flex; align-items: center; gap: 6px; margin: 0; white-space: nowrap; }
.check-label input { width: 18px; min-height: 18px; }

@media (max-width: 800px) {
  .mail-view { padding: 14px; }
  .topbar { align-items: start; }
  .account { display: none; }
  .workspace-layout { grid-template-columns: 1fr; }
  .workspace-nav { flex-direction: row; overflow-x: auto; }
  .nav-heading { display: none; }
  .nav-item { flex: 0 0 auto; width: auto; gap: 8px; white-space: nowrap; }
  .mail-grid { grid-template-columns: 1fr; min-height: 0; }
  .message-list-panel { border-inline-end: 0; }
  .message-list { max-height: 38vh; }
  .reader { padding: 24px 18px; border-top: 1px solid var(--border); }
  .reader-header { flex-direction: column; }
  .reader-header .primary { width: 100%; }
  .user-permissions { grid-template-columns: 1fr; }
  .compose-dialog form { padding: 22px 18px; }
}

@media (max-width: 480px) {
  .login-card { margin-top: 24px; padding: 26px 20px; }
  .topbar { flex-direction: column; }
  .topbar-actions { width: 100%; }
  .topbar-actions button { flex: 1; }
}

.tab-count {
  min-width: 1.5rem;
  padding: 0.05rem 0.4rem;
  border-radius: 999px;
  background: var(--border);
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.tab-count.has-unread {
  background: var(--primary);
  color: var(--primary-foreground);
}