:root {
  --bg: #f3f6fb;
  --text: #202636;
  --panel: #ffffff;
  --line: #d6deea;
  --primary: #0d6efd;
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.topbar nav a {
  margin-left: 14px;
  text-decoration: none;
  color: var(--primary);
}

main {
  padding: 20px;
}

.shell-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 16px;
}

.sidebar {
  position: sticky;
  top: 20px;
  height: fit-content;
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.sidebar-item a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  color: var(--text);
  background: #f8fbff;
}

.sidebar-item a span {
  color: #56607a;
  font-size: 0.9rem;
}

.sidebar-item.active a {
  border-color: var(--primary);
  background: #eaf2ff;
}

.content-panel {
  min-height: 320px;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 12px;
  margin: 14px 0;
}

.action-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  text-decoration: none;
  color: var(--text);
  background: #fff;
}

.action-card h3 {
  margin: 0 0 8px;
}

.action-card p {
  margin: 0;
  color: #556077;
}
.grid.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
}

.narrow {
  max-width: 900px;
}
.list {
  padding-left: 20px;
}
.meta {
  margin-top: 4px;
  color: #5c667a;
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th,
td {
  border: 1px solid var(--line);
  padding: 6px;
  text-align: left;
}

.form-grid {
  display: grid;
  gap: 10px;
}
input {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
}
button {
  width: fit-content;
  padding: 10px 14px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.qr-wrap {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.countdown-wrap {
  margin: 10px 0 16px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #f7fbff;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}

.countdown-label {
  font-size: 1rem;
  color: #4f5b75;
}

.countdown-value {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: #153986;
  min-width: 2ch;
  text-align: center;
}

#qr-image {
  width: 220px;
  height: 220px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 8px;
}

.flash-wrap {
  padding: 0 20px;
}
.flash {
  background: #e6f4ea;
  border: 1px solid #b7e1c2;
  padding: 10px;
  border-radius: 8px;
}

@media (max-width: 1000px) {
  .grid.two {
    grid-template-columns: 1fr;
  }
  .shell-layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .action-grid {
    grid-template-columns: 1fr;
  }
  .qr-wrap {
    flex-direction: column;
  }
}