:root {
  --ink: #17202a;
  --muted: #607080;
  --line: #d6dde8;
  --panel: #ffffff;
  --soft: #eef6f3;
  --accent: #166b5f;
  --accent-dark: #0d4d44;
  --error: #9f391f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: #f6f8fb;
  line-height: 1.45;
}

header {
  background: var(--accent-dark);
  color: #fff;
  padding: 24px clamp(16px, 4vw, 48px);
}

header h1 {
  margin: 0 0 6px;
  font-size: 32px;
}

header p {
  margin: 0;
  color: #dceeea;
}

main {
  width: min(1120px, calc(100% - 32px));
  margin: 24px auto 48px;
}

section,
.notice {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 18px;
}

h2 {
  margin: 0 0 16px;
  font-size: 20px;
}

h3 {
  margin: 18px 0 10px;
  font-size: 16px;
  color: var(--accent-dark);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.wide {
  grid-column: 1 / -1;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid #bfc8d5;
  border-radius: 6px;
  padding: 9px 10px;
  font: inherit;
  background: #fff;
}

input[type="file"] {
  padding: 8px;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.coauthors,
.list {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.coauthors th,
.coauthors td,
.list th,
.list td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  vertical-align: top;
}

.coauthors th,
.list th {
  background: var(--soft);
}

.actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

button,
.button {
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: inline-block;
  font: inherit;
  font-weight: 700;
  padding: 11px 16px;
  text-decoration: none;
}

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

.secondary {
  background: #374151;
}

.success {
  border-color: #b5dfd1;
  background: #f0faf6;
  color: #115e48;
}

.error {
  border-color: #e8b7aa;
  background: #fff7f4;
  color: var(--error);
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .coauthors,
  .list {
    display: block;
    overflow-x: auto;
  }

  main {
    width: min(100% - 20px, 1120px);
  }
}