/* TelegramMonitor — design system
 * Dark theme (default) + light theme override via [data-theme="light"].
 * Responsive at 640px breakpoint. No build step, no framework.
 */

/* ===== Dark theme (default) ===== */
:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #21262d;
  --surface-hover: #30363d;
  --border: #30363d;
  --border-light: #21262d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #2f81f7;
  --accent-hover: #4493f8;
  --accent-bg: rgba(47, 129, 247, 0.1);
  --green: #3fb950;
  --green-bg: rgba(63, 185, 80, 0.12);
  --red: #f85149;
  --red-bg: rgba(248, 81, 73, 0.12);
  --yellow: #d29922;
  --yellow-bg: rgba(210, 153, 34, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.35);
}

/* ===== Light theme ===== */
[data-theme="light"] {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --surface-hover: #e6e8eb;
  --border: #d0d7de;
  --border-light: #e6e8eb;
  --text: #1f2328;
  --text-dim: #636c76;
  --accent: #0969da;
  --accent-hover: #0550ae;
  --accent-bg: rgba(9, 105, 218, 0.08);
  --green: #1a7f37;
  --green-bg: rgba(26, 127, 55, 0.1);
  --red: #cf222e;
  --red-bg: rgba(207, 34, 46, 0.08);
  --yellow: #9a6700;
  --yellow-bg: rgba(154, 103, 0, 0.1);
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "SF Mono", "Fira Code", monospace; font-size: 0.88em; background: var(--surface-2); padding: 0.1em 0.35em; border-radius: var(--radius-sm); }

/* ===== Nav ===== */
.nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
}
.nav-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.nav-brand:hover { text-decoration: none; }
.nav a.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav a.nav-link:hover { color: var(--text); background: var(--surface-hover); text-decoration: none; }
.nav-spacer { flex: 1; }
.nav-right { display: flex; align-items: center; gap: 0.75rem; }
.nav-user { color: var(--text-dim); font-size: 0.82rem; white-space: nowrap; }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 34px;
  height: 34px;
  font-size: 1rem;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}
.theme-toggle:hover { background: var(--surface-hover); border-color: var(--text-dim); }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Mobile nav toggle */
.nav-mobile-toggle { display: none; }

/* ===== Layout ===== */
.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 4rem;
}
.container-wide { max-width: 1100px; }

/* Page header (title + action button row) */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

/* ===== Cards ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}
.card-tight { padding: 0; overflow: hidden; }

/* ===== Headings ===== */
h1 { font-size: 1.35rem; font-weight: 650; }
h2 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.6rem; }
h3 { font-size: 0.92rem; font-weight: 600; }

/* ===== Forms ===== */
.form-group { margin-bottom: 0.85rem; }
label {
  display: block;
  font-size: 0.83rem;
  color: var(--text-dim);
  margin-bottom: 0.3rem;
  font-weight: 500;
}
input[type=text], input[type=email], input[type=password], input[type=url],
input[type=number], input[type=time], select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}
input[type=checkbox] { width: auto; margin-right: 0.4rem; cursor: pointer; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.form-checks { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-top: 0.5rem; }
.form-checks label { display: flex; align-items: center; font-size: 0.88rem; color: var(--text); cursor: pointer; }

/* ===== Buttons ===== */
button, .btn {
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
  white-space: nowrap;
}
button:hover, .btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn-link {
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 0.2rem 0;
  font-size: inherit;
}
.btn-link:hover { color: var(--accent); background: none; }
.btn-danger { background: var(--red); }
.btn-danger:hover { background: #d33; }
[data-theme="light"] .btn-danger:hover { background: #b3230e; }
.btn-ghost {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface-hover); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.88rem;
  vertical-align: middle;
}
th { color: var(--text-dim); font-weight: 600; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
.td-mono { font-family: "SF Mono", monospace; font-size: 0.82rem; }

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.18rem 0.55rem;
  border-radius: 20px;
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: capitalize;
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.badge-up { background: var(--green-bg); color: var(--green); }
.badge-up::before { background: var(--green); }
.badge-down { background: var(--red-bg); color: var(--red); }
.badge-down::before { background: var(--red); }
.badge-paused { background: var(--surface-2); color: var(--text-dim); }
.badge-paused::before { background: var(--text-dim); }
.badge-flapping { background: var(--yellow-bg); color: var(--yellow); }
.badge-flapping::before { background: var(--yellow); }
.badge-unknown { background: var(--surface-2); color: var(--text-dim); }
.badge-unknown::before { background: var(--text-dim); }

/* ===== Flash messages ===== */
.flash {
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
  font-size: 0.88rem;
  border: 1px solid transparent;
}
.flash-success { background: var(--green-bg); border-color: var(--green); color: var(--green); }
.flash-error { background: var(--red-bg); border-color: var(--red); color: var(--red); }
.flash-info { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }

/* ===== Auth pages ===== */
.auth-card { max-width: 380px; margin: 2.5rem auto; }
.auth-links { margin-top: 0.85rem; font-size: 0.85rem; color: var(--text-dim); text-align: center; }

/* ===== Misc utilities ===== */
.text-dim { color: var(--text-dim); }
.text-sm { font-size: 0.83rem; }
.text-mono { font-family: "SF Mono", monospace; font-size: 0.82rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.actions { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.empty-state { text-align: center; padding: 2.5rem 1rem; color: var(--text-dim); }
.inline { display: inline; }
.nowrap { white-space: nowrap; }
.monitor-toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border-light);
}
.monitor-toggle-row:last-child { border-bottom: none; }

/* Status grid (public page) */
.status-grid { display: grid; gap: 0.75rem; }
.status-monitor-header { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.25rem; }
.status-monitor-meta { display: flex; gap: 0.4rem; flex-wrap: wrap; align-items: center; }
details summary { cursor: pointer; }

/* Status page summary banner */
.summary-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  font-weight: 600;
}
.summary-all-ok { background: var(--green-bg); color: var(--green); }
.summary-some-down { background: var(--red-bg); color: var(--red); }
.summary-all-down { background: var(--red-bg); color: var(--red); }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .container { padding: 1rem 1rem 3rem; }
  .page-header { flex-direction: column; align-items: stretch; }
  .nav { padding: 0.5rem 0.75rem; gap: 0.25rem; }
  .nav-user { display: none; }
  td, th { padding: 0.45rem 0.5rem; font-size: 0.82rem; }
  .actions { flex-direction: column; }
  .btn-sm { width: 100%; justify-content: center; }
}