:root {
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-border: #d7dde3;
  --color-text: #1f2933;
  --color-text-muted: #5a6b7b;
  --color-primary: #0b4f6c;
  --color-primary-dark: #08384c;
  --color-accent: #146c94;
  --color-success: #1e7145;
  --color-success-bg: #e6f4ea;
  --color-warning: #8a5a00;
  --color-warning-bg: #fdf1d6;
  --color-danger: #a4222c;
  --color-danger-bg: #fbe7e8;
  --radius: 6px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.45;
}

a { color: var(--color-accent); }

header.institutional-header {
  background: var(--color-primary);
  color: #fff;
  padding: 14px 24px;
}

header.institutional-header .title-main {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin: 0;
}

header.institutional-header .subtitle {
  font-size: 0.95rem;
  margin: 2px 0 0 0;
  opacity: 0.92;
}

header.institutional-header .functional-name {
  font-size: 0.85rem;
  margin: 4px 0 0 0;
  opacity: 0.85;
}

nav.main-nav {
  background: var(--color-primary-dark);
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

nav.main-nav a {
  display: inline-block;
  color: #eaf2f6;
  text-decoration: none;
  padding: 10px 14px;
  font-size: 0.88rem;
  border-bottom: 3px solid transparent;
}

nav.main-nav a:hover, nav.main-nav a.active {
  border-bottom-color: #fff;
  background: rgba(255,255,255,0.08);
}

nav.main-nav .nav-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.3em;
  height: 1.3em;
  margin-right: 6px;
  border-radius: 50%;
  background: #fff;
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.85em;
}

.topbar-user {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  padding: 6px 24px;
  background: var(--color-primary-dark);
  color: #d7e6ec;
  font-size: 0.82rem;
}

.topbar-user form { display: inline; }
.topbar-user button.link-button {
  background: none; border: none; color: #d7e6ec; text-decoration: underline; cursor: pointer; font-size: 0.82rem; padding: 0;
}

main.content {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 18px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.stat-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.stat-tile .value { font-size: 1.7rem; font-weight: 700; color: var(--color-primary); }
.stat-tile .label { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 2px; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.data-table th {
  text-align: left;
  background: #eef2f5;
  padding: 8px 10px;
  border-bottom: 2px solid var(--color-border);
  font-weight: 600;
  white-space: nowrap;
}

table.data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

table.data-table tr:hover td { background: #f8fafb; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 600;
}

.badge-pending { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-viewed { background: #e2e8ef; color: #33475b; }
.badge-archived { background: #ece7f5; color: #4b3a86; }
.badge-unassigned { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-review { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-ok { background: var(--color-success-bg); color: var(--color-success); }
.badge-error { background: var(--color-danger-bg); color: var(--color-danger); }

.btn {
  display: inline-block;
  padding: 7px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--color-primary-dark); }

.btn-secondary {
  background: #fff;
  color: var(--color-primary);
}

.btn-secondary:hover { background: #eef4f7; }

.btn-danger {
  background: #fff;
  border-color: var(--color-danger);
  color: var(--color-danger);
}
.btn-danger:hover { background: var(--color-danger-bg); }

.btn-sm { padding: 4px 9px; font-size: 0.78rem; }

form.inline { display: inline; }

input[type=text], input[type=email], input[type=password], input[type=date], input[type=number], select, textarea {
  padding: 6px 9px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-family: inherit;
}

.flash-list { margin-bottom: 16px; }
.flash { padding: 10px 14px; border-radius: var(--radius); margin-bottom: 8px; font-size: 0.9rem; }
.flash-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid #b7dfc4; }
.flash-error { background: var(--color-danger-bg); color: var(--color-danger); border: 1px solid #f0b8bb; }
.flash-info { background: #e5eef3; color: var(--color-primary-dark); border: 1px solid #bcd5e2; }

.upload-dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--color-text-muted);
  background: var(--color-surface);
}

.upload-dropzone.dragover { border-color: var(--color-primary); background: #eef6f9; }

.study-group { border: 1px solid var(--color-border); border-radius: var(--radius); margin-bottom: 14px; background: var(--color-surface); }
.study-group-header { padding: 12px 16px; border-bottom: 1px solid var(--color-border); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.study-group-header .study-link { font-size: 1.05rem; font-weight: 700; }
.study-group-body { padding: 10px 16px; }
.block-group { margin-bottom: 8px; }
.block-title { font-weight: 600; font-size: 0.85rem; color: var(--color-text-muted); margin: 6px 0 4px; }

.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--color-primary); }
.login-box { background: #fff; border-radius: var(--radius); padding: 34px 38px; width: 360px; max-width: 92vw; }
.login-box h1 { font-size: 1.25rem; margin: 0 0 4px; color: var(--color-primary); }
.login-box .subtitle { font-size: 0.85rem; color: var(--color-text-muted); margin: 0 0 4px; }
.login-box .functional { font-size: 0.8rem; color: var(--color-text-muted); margin: 0 0 20px; }
.login-box label { display: block; font-size: 0.85rem; margin-bottom: 4px; margin-top: 12px; }
.login-box input { width: 100%; }
.login-box button { width: 100%; margin-top: 18px; }

.field-row { margin-bottom: 12px; }
.field-row label { display: block; font-size: 0.85rem; margin-bottom: 4px; font-weight: 600; }
.help-text { font-size: 0.78rem; color: var(--color-text-muted); margin-top: 4px; }

.text-muted { color: var(--color-text-muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }