:root {
  --bg: #f6f7f8;
  --panel: #ffffff;
  --line: #e3e6ea;
  --text: #1c2430;
  --muted: #687382;
  --accent: #0f6f6b;
  --accent-soft: #e5f2f1;
  --danger: #b3443c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

[hidden] { display: none !important; }

.login-screen {
  position: fixed;
  inset: 0;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}
.login-card {
  background: var(--panel);
  border-radius: 14px;
  padding: 32px 28px;
  width: 360px;
  max-width: 100%;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.login-title { margin: 0; font-size: 20px; }
.login-sub { margin: 0 0 4px; color: var(--muted); font-size: 13px; }
.login-error { margin: 0; color: var(--danger); font-size: 13px; }
.login-card input {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  width: 100%;
}
.login-card .btn { align-self: flex-start; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: baseline; gap: 10px; }
.logo { font-weight: 700; letter-spacing: 0.5px; }
.sub { color: var(--muted); font-size: 14px; }

.actions { display: flex; gap: 8px; }

.nav-tabs { display: flex; gap: 4px; }
.nav-tab {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}
.nav-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.sidebar-title { margin: 4px 0 10px; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }

.add-study { display: flex; gap: 8px; margin-bottom: 16px; }
.add-study input { flex: 1; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.add-study .btn { flex-shrink: 0; }

.gallery-section { margin-top: 24px; }
.gallery-actions { display: flex; gap: 8px; margin-bottom: 12px; }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.gallery-item { position: relative; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--panel); }
.gallery-item img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; display: block; }
.gallery-item.main { border-color: var(--accent); }
.gallery-del { position: absolute; top: 4px; right: 4px; background: rgba(0, 0, 0, 0.6); color: #fff; border: none; border-radius: 4px; padding: 2px 7px; cursor: pointer; font-size: 12px; }
.gallery-main-tag { position: absolute; bottom: 4px; left: 4px; background: var(--accent); color: #fff; font-size: 11px; padding: 2px 6px; border-radius: 4px; }

.btn {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.small { padding: 5px 10px; font-size: 12px; }

.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 16px;
  padding: 16px 20px;
  min-height: calc(100vh - 61px);
}

.sidebar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  align-self: start;
  position: sticky;
  top: 73px;
}

.search {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 10px;
}

.ing-list { list-style: none; margin: 0; padding: 0; max-height: 70vh; overflow: auto; }
.ing-list li {
  padding: 9px 10px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}
.ing-list li:hover { background: var(--accent-soft); }
.ing-list li.active { background: var(--accent-soft); font-weight: 600; }
.ing-name { font-size: 14px; }
.ing-badge { font-size: 11px; color: var(--muted); white-space: nowrap; }
.ing-badge.ready { color: var(--accent); }

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

.empty { color: var(--muted); padding: 40px; text-align: center; }

.section-title { margin: 0 0 4px; font-size: 18px; }
.section-sub { margin: 0 0 16px; color: var(--muted); font-size: 14px; }

.study {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 14px;
}

.study-title { margin: 0; font-size: 15px; line-height: 1.35; }
.study-title a { color: inherit; text-decoration: none; }
.study-title a:hover { text-decoration: underline; color: var(--accent); }

.study-meta { color: var(--muted); font-size: 12px; margin-top: 4px; }
.study-authors { color: var(--muted); font-size: 12px; margin: 6px 0; }

.abstract { margin: 8px 0; font-size: 13px; }
.abstract summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.abstract-text { white-space: pre-wrap; color: #34404d; }

.study-fields { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; }

.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.field.checkbox { flex-direction: row; align-items: center; gap: 8px; }
.field select, .field input[type="text"], .field textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  color: var(--text);
  min-width: 140px;
}

.study-summaries { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.study-summaries textarea { width: 100%; resize: vertical; }
.study-extra { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 10px; }
.study-extra input { width: 100%; }
.title-field input { width: 100%; }

.study.site-ready { border-left: 4px solid var(--accent); }
.study.rejected { opacity: 0.6; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .study-summaries, .study-extra { grid-template-columns: 1fr; }
}