:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #19202f;
  --muted: #667085;
  --border: #d8deea;
  --accent: #2b6de8;
  --accent-dark: #1f56ba;
  --danger: #b42318;
  --success: #067647;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Segoe UI", Arial, "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 28px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav form,
.row-actions form {
  margin: 0;
}

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 32px auto;
}

.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  line-height: 1.2;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.narrow {
  max-width: 520px;
  margin-inline: auto;
}

.stack {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  padding: 10px 12px;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  padding: 9px 14px;
}

button:hover,
.button:hover {
  background: var(--accent-dark);
}

.link-button {
  min-height: auto;
  background: transparent;
  color: var(--accent);
  padding: 0;
}

.danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid #f3b5ae;
}

.danger:hover {
  background: #fff2f0;
}

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

.error {
  color: var(--danger);
  font-weight: 700;
}

.success {
  color: var(--success);
  font-weight: 700;
}

.schedule-list {
  display: grid;
  gap: 12px;
}

.schedule-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}

.schedule-row p {
  margin: 4px 0 0;
  color: var(--muted);
}

.status-completed {
  opacity: 0.72;
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

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

.code {
  overflow-x: auto;
  border-radius: 8px;
  background: #101828;
  color: #e6edf7;
  font-size: 20px;
  margin: 16px 0;
  padding: 18px;
}

@media (max-width: 640px) {
  .topbar,
  .page-head,
  .schedule-row,
  .row-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar {
    gap: 12px;
    padding: 16px;
  }

  .nav {
    flex-wrap: wrap;
  }
}