body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: #122033;
  background:
    radial-gradient(circle at 10% 10%, #ffefd9 0%, transparent 35%),
    radial-gradient(circle at 85% 5%, #d7f2ff 0%, transparent 35%),
    linear-gradient(160deg, #f4f7ff 0%, #f7fbff 60%, #f2faf4 100%);
}

.container {
  max-width: 1500px;
  margin: 24px auto 36px;
  padding: 0 16px;
}

h1 {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  letter-spacing: 0.01em;
}

.hint {
  margin: 10px 0 16px;
  color: #355071;
}

.auth-note {
  margin-bottom: 14px;
  border: 1px solid #bed8f8;
  border-radius: 10px;
  padding: 10px 12px;
  background: #f1f8ff;
  color: #264d71;
}

.error {
  margin-bottom: 14px;
  border: 1px solid #f0c6a2;
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff5e8;
  color: #8a4b19;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 8px 0 16px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid #d8e2f1;
  border-radius: 12px;
  padding: 12px;
}

input,
select,
button,
.download {
  padding: 8px 10px;
  border: 1px solid #b9c5d8;
  border-radius: 8px;
  background: #ffffff;
  color: #123054;
  font: inherit;
}

input {
  min-width: 140px;
}

button,
.download {
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover,
.download:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 7px rgba(36, 63, 97, 0.15);
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
  color: #233e5b;
}

.error-text {
  color: #b32424;
  font-weight: 700;
}

.tips {
  margin-bottom: 16px;
  border: 1px solid #d7e4f6;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.8);
  padding: 8px 12px;
}

h2 {
  margin-bottom: 8px;
  margin-top: 22px;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
}

.table-wrap {
  overflow: auto;
  border: 1px solid #d6e0ef;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 8px 30px rgba(25, 55, 89, 0.08);
}

table {
  border-collapse: separate;
  border-spacing: 0;
  min-width: 1200px;
  width: 100%;
}

th,
td {
  border-right: 1px solid #deebf8;
  border-bottom: 1px solid #deebf8;
  padding: 8px;
  text-align: left;
  white-space: nowrap;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 3;
  background: #eff5fc;
}

.sticky-col {
  position: sticky;
  left: 0;
  z-index: 2;
  background: #f9fcff;
  min-width: 130px;
  box-shadow: 1px 0 0 #deebf8;
}

.sticky-col.secondary {
  left: 130px;
  min-width: 170px;
  background: #f4f9ff;
}

thead .sticky-col {
  z-index: 4;
  background: #e7f1fb;
}

.sheet-cell {
  min-width: 140px;
}

.editable-cell {
  background: #fffef8;
  outline: none;
  transition: background 0.2s ease;
}

.editable-cell:focus {
  background: #fff9df;
  box-shadow: inset 0 0 0 2px #8db8ff;
}

.editable-cell.saving {
  background: #eef7ff;
}

.editable-cell.saved {
  background: #e8ffec;
}

.editable-cell.save-error {
  background: #ffeaea;
}

@media (max-width: 900px) {
  .toolbar {
    align-items: stretch;
  }

  input,
  select,
  button,
  .download {
    width: 100%;
  }

  .sticky-col,
  .sticky-col.secondary {
    position: static;
    box-shadow: none;
  }
}