* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0e17;
  --surface: #131a2b;
  --border: #1e2a42;
  --text: #e2e8f0;
  --muted: #64748b;
  --green: #22c55e;
  --red: #ef4444;
  --blue: #3b82f6;
  --orange: #f59e0b;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--blue), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav { display: flex; align-items: center; gap: 1rem; }

.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--surface);
  border: 1px solid var(--border);
}

.badge.paid { background: var(--blue); border-color: var(--blue); }

.btn-upgrade {
  padding: 0.5rem 1rem;
  background: var(--blue);
  color: white;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
}

main { max-width: 900px; margin: 2rem auto; padding: 0 1rem; }

.add-monitor { margin-bottom: 2rem; }

#add-form {
  display: flex;
  gap: 0.5rem;
}

#add-form input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}

#add-form input:focus { outline: none; border-color: var(--blue); }

#add-form button {
  padding: 0.75rem 1.5rem;
  background: var(--green);
  color: white;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

.monitor-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 0.75rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.monitor-card:hover { border-color: var(--blue); }

.monitor-info { display: flex; align-items: center; gap: 0.75rem; }

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-dot.up { background: var(--green); box-shadow: 0 0 6px var(--green); }
.status-dot.down { background: var(--red); box-shadow: 0 0 6px var(--red); }
.status-dot.unknown { background: var(--muted); }

.monitor-url {
  font-size: 0.95rem;
  font-weight: 500;
  word-break: break-all;
}

.monitor-actions { display: flex; align-items: center; gap: 0.75rem; }

.monitor-time { font-size: 0.8rem; color: var(--muted); }

.btn-delete {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.25rem;
}

.btn-delete:hover { color: var(--red); }

#stats-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 400px;
  height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--border);
  padding: 1.5rem;
  overflow-y: auto;
  z-index: 10;
}

.btn-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.5rem;
  cursor: pointer;
}

#stats-url {
  font-size: 1rem;
  margin-bottom: 1.5rem;
  word-break: break-all;
  padding-right: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  text-align: center;
  padding: 1rem 0.5rem;
  background: var(--bg);
  border-radius: 8px;
}

.stat-value { display: block; font-size: 1.5rem; font-weight: 700; }
.stat-label { display: block; font-size: 0.75rem; color: var(--muted); margin-top: 0.25rem; }

.period-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.period-tabs button {
  padding: 0.4rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
}

.period-tabs button.active { background: var(--blue); color: white; border-color: var(--blue); }

#recent-checks { font-size: 0.85rem; }

.check-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.check-status { font-weight: 600; }
.check-status.up { color: var(--green); }
.check-status.down { color: var(--red); }

.hidden { display: none !important; }

.limit-msg { color: var(--orange); font-size: 0.85rem; margin-top: 0.5rem; }

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--muted);
}

.empty-state p { font-size: 1.1rem; margin-bottom: 0.5rem; }