:root {
  --ink: #17212b;
  --muted: #687583;
  --line: #dce2e7;
  --canvas: #f5f7f8;
  --panel: #ffffff;
  --nav: #172b35;
  --nav-muted: #aab9c0;
  --accent: #167d70;
  --accent-dark: #0f665c;
  --danger: #b53b36;
  --warning: #9d6b13;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--canvas); }
button, input, select, textarea { font: inherit; }
button { border: 0; border-radius: 7px; padding: .68rem 1rem; background: var(--accent); color: white; cursor: pointer; font-weight: 650; }
button:hover { background: var(--accent-dark); }
button:disabled { cursor: not-allowed; opacity: .55; }
button.secondary { background: #e8f1ef; color: var(--accent-dark); }
button.text-button { background: transparent; color: inherit; padding: .35rem 0; }
button.danger { background: var(--danger); }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.muted { color: var(--muted); font-weight: 400; }
.error { color: var(--danger); min-height: 1.4em; margin-top: .8rem; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 1.2rem; background: linear-gradient(145deg, #eef4f2, #f7f7f5); }
.login-card { width: min(420px, 100%); padding: 2.5rem; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 18px 50px rgba(23, 43, 53, .09); }
.login-card h1 { margin: 1rem 0 .25rem; }
.login-card p { color: var(--muted); margin: 0 0 1.8rem; }
label { display: grid; gap: .4rem; margin: 1rem 0; font-size: .92rem; font-weight: 650; }
input, select, textarea { width: 100%; border: 1px solid #c9d1d7; border-radius: 7px; padding: .72rem .8rem; background: white; color: var(--ink); }
.input-action { display: grid; grid-template-columns: 1fr auto; gap: .5rem; }
fieldset { border: 1px solid var(--line); border-radius: 8px; margin: 1rem 0; padding: 1rem; }
legend { font-weight: 750; padding: 0 .3rem; }
.check-row { display: flex; align-items: center; gap: .55rem; margin: .55rem 0; font-weight: 500; }
.check-row input { width: auto; }
input:focus, textarea:focus { outline: 3px solid rgba(22,125,112,.15); border-color: var(--accent); }
.login-card button { width: 100%; margin-top: .5rem; }
.brand-logo { display: block; max-width: 100%; height: auto; object-fit: contain; }
.login-logo { width: 100%; margin-bottom: 1rem; border-radius: 10px; }
.mobile-logo { width: 156px; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 245px 1fr; }
.sidebar { background: var(--nav); color: white; padding: 1.5rem 1rem; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; padding: 0 .55rem 1.8rem; }
.sidebar-logo { width: 196px; }
.sidebar nav { display: grid; gap: .25rem; }
.sidebar nav button { text-align: left; background: transparent; color: var(--nav-muted); padding: .72rem .8rem; }
.sidebar nav button:hover, .sidebar nav button.active { background: rgba(255,255,255,.09); color: white; }
.sidebar-footer { margin-top: auto; padding: 1rem .7rem 0; border-top: 1px solid rgba(255,255,255,.13); display: grid; gap: .4rem; color: var(--nav-muted); }
.content { padding: 2.4rem; min-width: 0; }
.page-heading, .panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.page-heading { margin-bottom: 1.4rem; }
.page-heading h1 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.2rem); }
.eyebrow { margin: 0 0 .3rem; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.metric, .panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
.metric { padding: 1.2rem; }
.metric span { display: block; color: var(--muted); font-size: .84rem; }
.metric strong { display: block; margin-top: .35rem; font-size: 1.55rem; }
.panel { padding: 1.2rem; margin-bottom: 1rem; overflow: hidden; }
.panel-heading { margin-bottom: 1rem; }
.panel h2 { margin: 0; font-size: 1.05rem; }
.domain-row, .file-row, .discovery-row { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 1rem; padding: .9rem .2rem; border-top: 1px solid var(--line); }
.domain-row:first-child, .file-row:first-child, .discovery-row:first-child { border-top: 0; }
.domain-row strong, .file-row strong { display: block; }
.subtext { color: var(--muted); font-size: .82rem; margin-top: .2rem; }
.badge { display: inline-flex; padding: .28rem .5rem; border-radius: 99px; font-size: .75rem; font-weight: 750; background: #eef1f3; color: #52616d; }
.badge.good { background: #e4f4ef; color: #116a5e; }
.badge.warning { background: #fff3d9; color: var(--warning); }
.facts { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: .7rem; margin-bottom: 1rem; }
.fact { padding: .85rem; background: white; border: 1px solid var(--line); border-radius: 8px; }
.fact span { display: block; color: var(--muted); font-size: .76rem; margin-bottom: .25rem; }
.tabs { display: flex; gap: .3rem; overflow-x: auto; border-bottom: 1px solid var(--line); margin-bottom: 1rem; }
.tabs button { flex: 0 0 auto; background: transparent; color: var(--muted); border-radius: 0; padding: .7rem .85rem; border-bottom: 2px solid transparent; }
.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-bottom: 1rem; }
.toolbar button { padding: .52rem .72rem; }
.breadcrumbs { display: flex; align-items: center; flex-wrap: wrap; min-width: 0; margin-right: auto; color: var(--muted); }
.breadcrumb-link { padding: .25rem .18rem; border-radius: 4px; background: transparent; color: var(--accent-dark); overflow-wrap: anywhere; }
.breadcrumb-link:hover, .breadcrumb-link:focus-visible { background: #e8f1ef; text-decoration: underline; }
.breadcrumb-link[aria-current="page"] { color: var(--ink); }
.breadcrumb-separator { padding: 0 .08rem; color: var(--muted); }
.drop-zone { border: 2px dashed #b9c6cc; border-radius: 9px; padding: 1.4rem; text-align: center; color: var(--muted); margin-bottom: 1rem; }
.drop-zone.dragging { border-color: var(--accent); background: #edf7f4; }
.file-row { grid-template-columns: minmax(0,2fr) 100px 170px auto; font-size: .9rem; }
.file-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .4rem; }
.file-actions button { padding: .48rem .65rem; }
.file-editor { margin-bottom: 1rem; padding: 1rem; border: 1px solid var(--line); border-radius: 9px; background: #f8fafb; }
.file-editor h3 { margin: 0; font-size: 1rem; overflow-wrap: anywhere; }
.file-editor textarea { min-height: 48vh; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; line-height: 1.5; }
.file-editor textarea[readonly] { background: #eef2f4; }
.log-grid { display: grid; gap: 1rem; margin-top: 1rem; }
.log-section { min-width: 0; }
.log-section h3 { margin: 0 0 .5rem; font-size: .95rem; }
.log-section pre { max-height: 360px; margin: 0; padding: .9rem; overflow: auto; border-radius: 8px; background: #101d24; color: #dce9e7; font: .78rem/1.45 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }
.management-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin: 1rem 0; }
.management-card { padding: 1rem; border: 1px solid var(--line); border-radius: 9px; background: #f8fafb; }
.management-card > div:first-child { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.management-card h3 { margin: 0; font-size: 1rem; }
.management-card button { margin-top: .5rem; }
.settings-domain-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; padding: 1rem .2rem; border-top: 1px solid var(--line); }
.settings-domain-row:first-child { border-top: 0; }
.settings-status, .settings-actions { display: flex; flex-wrap: wrap; gap: .4rem; }
.settings-status { margin-top: .55rem; }
.settings-actions { justify-content: flex-end; }
.settings-actions button { padding: .5rem .65rem; }
.notice { position: sticky; top: 1rem; z-index: 5; padding: .8rem 1rem; margin-bottom: 1rem; border-radius: 8px; background: #e4f4ef; border: 1px solid #acd8cc; }
.empty { padding: 2rem; text-align: center; color: var(--muted); }
.callout { padding: 1rem; border-left: 4px solid var(--warning); background: #fff8e8; }
.mailbox-card { padding: 1rem 0; border-top: 1px solid var(--line); }
.mailbox-card:first-child { border-top: 0; }
.mail-detail { display: grid; gap: .55rem; margin: .8rem 0; color: var(--muted); font-size: .86rem; }
.mail-chip { display: inline-flex; align-items: center; gap: .3rem; padding: .22rem .45rem; border-radius: 99px; background: #eef1f3; color: var(--ink); }
button.mail-remove { padding: 0; width: 1.15rem; height: 1.15rem; border-radius: 50%; line-height: 1; background: var(--danger); }
.back { color: var(--accent-dark); margin-bottom: 1rem; }
.mobile-header { display: none; }
@media (max-width: 900px) {
  .app-shell { display: block; }
  .mobile-header { display: flex; position: sticky; top: 0; z-index: 10; height: 58px; align-items: center; gap: 1rem; padding: 0 1rem; background: var(--nav); color: white; }
  .icon-button { background: transparent; padding: .3rem; font-size: 1.35rem; }
  .sidebar { position: fixed; inset: 58px auto 0 0; z-index: 9; width: 245px; height: calc(100vh - 58px); transform: translateX(-100%); transition: transform .2s ease; }
  .sidebar.open { transform: translateX(0); }
  .brand { display: none; }
  .content { padding: 1.2rem; }
  .metrics, .facts { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 600px) {
  .login-card { padding: 1.5rem; }
  .metrics, .facts { grid-template-columns: 1fr; }
  .management-grid { grid-template-columns: 1fr; }
  .page-heading { align-items: flex-start; }
  .file-row { grid-template-columns: minmax(0,1fr) auto; }
  .file-row > :nth-child(2), .file-row > :nth-child(3) { display: none; }
  .file-actions { justify-content: flex-start; }
  .domain-row { align-items: start; }
  .settings-domain-row { grid-template-columns: 1fr; align-items: start; }
  .settings-actions { justify-content: flex-start; }
}