:root {
  color-scheme: light;
  --bg: #0f172a;
  --card: #111827;
  --panel: #1f2937;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #22d3ee;
  --accent-strong: #06b6d4;
  --danger: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(120% 120% at 10% 20%, #0ea5e9 0%, #0f172a 40%), #0f172a;
  color: var(--text);
  min-height: 100vh;
}

header.hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  padding: 40px;
  align-items: center;
}

main {
  padding: 0 40px 40px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
  margin: 0 0 8px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(32px, 3vw, 44px);
}

.lede {
  margin: 0 0 18px;
  max-width: 54ch;
  color: #ffffff;
}

.header-actions {
  margin: 8px 0 12px;
}

.settings-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #ffffff;
  text-decoration: none;
  background: rgba(15, 23, 42, 0.6);
  font-size: 18px;
  transition: background 0.1s ease, transform 0.08s ease, filter 0.08s ease;
}

.settings-link:hover {
  background: rgba(15, 23, 42, 0.9);
  filter: brightness(1.05);
}

.settings-link:active {
  transform: translateY(1px);
}

.settings-page {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(120% 120% at 10% 20%, #0ea5e9 0%, #0f172a 40%), #0f172a;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.settings-card {
  background: rgba(17, 24, 39, 0.95);
  border-radius: 18px;
  padding: 24px 24px 20px;
  max-width: 720px;
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
}

.settings-header h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

.settings-field {
  margin: 18px 0 14px;
}

.settings-periods {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.settings-period-row {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 12px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.settings-input {
  width: 100%;
}

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

.settings-back-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.settings-back-link:hover {
  text-decoration: underline;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-weight: 600;
  color: var(--text);
}

select,
input[type="file"],
button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 15px;
}

button {
  cursor: pointer;
  background: linear-gradient(120deg, var(--accent-strong), var(--accent));
  border: none;
  font-weight: 700;
  transition: transform 0.08s ease, filter 0.08s ease;
}

button:hover {
  filter: brightness(1.05);
}

button:active {
  transform: translateY(1px);
}

button.ghost {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.upload {
  margin-top: 14px;
}

.upload-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.status {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 18px;
  border-radius: 16px;
  align-self: flex-start;
}

.muted {
  color: var(--muted);
  margin: 0;
}

#alarmStatus {
  margin: 6px 0 0;
  font-weight: 700;
}

.small {
  font-size: 13px;
}

.button-row {
  display: flex;
  gap: 8px;
}

h2 {
  margin: 18px 0 12px;
}

.calendar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}

.day-card {
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 14px;
  padding: 14px;
  backdrop-filter: blur(6px);
}

.day-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.day-header .date {
  margin: 0;
  font-weight: 700;
}

.periods {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.period {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--panel);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.period .time {
  margin: 4px 0 0;
  font-weight: 700;
}

.period .toggle {
  min-width: 100px;
}

.period.armed {
  border-color: var(--accent);
}

.period.disarmed {
  border-color: rgba(248, 113, 113, 0.5);
}

.period.disarmed .time {
  color: var(--muted);
}

.danger {
  color: var(--danger);
}

@media (max-width: 900px) {
  header.hero {
    grid-template-columns: 1fr;
  }
}