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

:root {
  --bg: #0f1115;
  --bg-2: #161a22;
  --bg-3: #1d2230;
  --fg: #e6e8ee;
  --muted: #8a93a6;
  --border: #2a3142;
  --accent: #5b9cff;
  --ok: #4ade80;
  --down: #f87171;
  --warn: #fbbf24;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fb;
    --bg-2: #ffffff;
    --bg-3: #eef1f7;
    --fg: #1c1f26;
    --muted: #6b7280;
    --border: #e1e5ee;
    --accent: #2a6df4;
    --ok: #16a34a;
    --down: #dc2626;
    --warn: #d97706;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

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

.topbar {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.logo { font-weight: 700; font-size: 18px; color: var(--fg); }
.logo:hover { text-decoration: none; }
.tagline { color: var(--muted); font-size: 13px; }

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
}

h1 { margin-top: 0; font-size: 24px; }
h2 { margin-top: 32px; font-size: 18px; }

.card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
}

label { display: block; margin: 10px 0; }
label > span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 4px; }

input[type="text"], input[type="url"], input[type="email"], input[type="number"] {
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--fg);
  font: inherit;
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

button {
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  font: inherit;
  cursor: pointer;
}
button:hover { filter: brightness(1.06); }
button.link {
  background: transparent;
  color: var(--accent);
  border-color: transparent;
  padding: 4px 8px;
}
button.del {
  background: transparent;
  color: var(--down);
  border-color: var(--border);
  padding: 4px 10px;
  font-size: 13px;
}
button.del:hover { background: var(--bg-3); }

.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.row-form { display: grid; grid-template-columns: 2fr 1fr 110px auto; gap: 10px; align-items: end; }
@media (max-width: 720px) { .row-form { grid-template-columns: 1fr; } }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.error { color: var(--down); }

.hero { max-width: 620px; }

.banner {
  background: rgba(91,156,255,0.12);
  border: 1px solid var(--accent);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: 14px;
}

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

.settings { margin: 12px 0; }
.settings summary { cursor: pointer; padding: 4px 0; }

table.sites {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
table.sites th, table.sites td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table.sites th { color: var(--muted); font-weight: 500; font-size: 13px; background: var(--bg-3); }
table.sites tr:last-child td { border-bottom: none; }
table.sites tr.empty td { color: var(--muted); text-align: center; padding: 22px; }
.url-cell { display: flex; flex-direction: column; gap: 2px; }
.site-name { font-weight: 600; }
.url-cell a { font-size: 13px; word-break: break-all; }

.status {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.status-up { background: rgba(74,222,128,0.15); color: var(--ok); }
.status-down { background: rgba(248,113,113,0.15); color: var(--down); }
.status-unknown { background: var(--bg-3); color: var(--muted); }

.interval-cell { cursor: pointer; white-space: nowrap; }
.interval-cell:hover .interval-val { color: var(--accent); }
.interval-input {
  width: 70px;
  padding: 2px 6px;
  font: inherit;
  font-size: 13px;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--bg-3);
  color: var(--fg);
}

.checks-detail {
  background: var(--bg-3);
  padding: 10px 14px;
  font-size: 13px;
}
.checks-detail table { width: 100%; border-collapse: collapse; }
.checks-detail td { padding: 4px 8px; border-bottom: 1px dashed var(--border); }
.checks-detail .ok { color: var(--ok); }
.checks-detail .fail { color: var(--down); }
.periods-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.periods-table th, .periods-table td { padding: 5px 8px; border-bottom: 1px dashed var(--border); overflow: hidden; white-space: nowrap; }
.periods-table th { color: var(--muted); font-weight: 500; font-size: 12px; }
.periods-table th:nth-child(1) { width: 72px; }
.periods-table th:nth-child(2), .periods-table th:nth-child(3) { width: 128px; }
.periods-table th:nth-child(4) { width: 172px; }
.periods-table th:nth-child(5) { width: 52px; }
.periods-table th:nth-child(6) { width: 100px; }
.period-error { color: var(--muted); font-size: 12px; text-overflow: ellipsis; }

.events-header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.events-header h2 { margin-bottom: 8px; }
.events-controls { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); flex-wrap: wrap; margin-top: 4px; }
.events-controls input[type="number"] { width: 52px; padding: 3px 8px; font-size: 13px; }
.events-sort { display: flex; gap: 4px; }
button.sort-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 3px 10px;
  font-size: 13px;
  border-radius: 6px;
}
button.sort-btn.active { color: var(--fg); border-color: var(--accent); background: var(--bg-3); }
button.sort-btn:hover { color: var(--fg); }

.events { list-style: none; padding: 0; }
.events li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
}
.events li:last-child { border-bottom: none; }
.event-type { font-weight: 600; min-width: 110px; }
.event-down { color: var(--down); }
.event-recovered { color: var(--ok); }
.event-site_added, .event-site_removed, .event-interval_changed { color: var(--muted); }
.event-site { flex: 1; word-break: break-all; }
.event-detail { color: var(--muted); font-size: 12px; }
.event-ts { color: var(--muted); font-size: 12px; }

.sites-header { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.sites-header h2 { margin: 0; }
#check-now-all { font-size: 13px; }

.smtp-block { margin: 12px 0 4px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-2); }
.smtp-block summary { cursor: pointer; color: var(--muted); font-size: 13px; }
.smtp-block[open] summary { color: var(--fg); margin-bottom: 8px; }
.smtp-block p { margin: 6px 0 12px; }

code {
  background: var(--bg-3);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
}