/* ============================================================
   KB UK Köln — Main Stylesheet
   ============================================================ */

:root {
  --color-primary:      #0057a8;
  --color-primary-dark: #003f7a;
  --color-primary-light:#e8f0fb;
  --color-success:      #1a7f45;
  --color-success-bg:   #eaf7ee;
  --color-warning:      #8a5800;
  --color-warning-bg:   #fff8e1;
  --color-danger:       #b71c1c;
  --color-danger-bg:    #fdecea;
  --color-info:         #1565c0;
  --color-info-bg:      #e3f0ff;
  --color-muted:        #546e7a;
  --color-muted-bg:     #eceff1;
  --color-text:         #1a1a2e;
  --color-border:       #d0d7de;
  --color-bg:           #f4f6f9;
  --color-surface:      #ffffff;
  --color-nav-bg:       #0c2d5c;
  --radius:             6px;
  --shadow-sm:          0 1px 4px rgba(0,0,0,.08);
  --shadow:             0 2px 10px rgba(0,0,0,.1);
  --font:               system-ui, -apple-system, "Segoe UI", sans-serif;
  --nav-height:         56px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   Navigation
   ============================================================ */

.nav {
  background: var(--color-nav-bg);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 6px rgba(0,0,0,.3);
}

.nav-brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
  text-decoration: none;
}
.nav-brand:hover { text-decoration: none; color: #c9d8f0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
  flex: 1;
}

.nav-link {
  color: #a8c4e8;
  padding: .4rem .8rem;
  border-radius: var(--radius);
  font-size: .875rem;
  transition: background .15s, color .15s;
  text-decoration: none;
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,.12);
  color: #fff;
  text-decoration: none;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-left: auto;
}

.nav-user-name {
  color: #c9d8f0;
  font-size: .8rem;
}

.nav-user-role {
  background: rgba(255,255,255,.15);
  color: #fff;
  font-size: .7rem;
  font-weight: 600;
  padding: .15rem .5rem;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.nav-logout {
  color: #a8c4e8;
  font-size: .8rem;
  padding: .3rem .7rem;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background .15s;
}
.nav-logout:hover { background: rgba(255,255,255,.1); color: #fff; text-decoration: none; }

/* ============================================================
   Layout
   ============================================================ */

.page {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
}

/* ============================================================
   Cards
   ============================================================ */

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.card-body { padding: 1.25rem 1.5rem; }

/* ============================================================
   Filter bar
   ============================================================ */

.filter-bar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: .9rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: flex-end;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  min-width: 160px;
  flex: 1;
}

.filter-group label {
  font-size: .75rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.filter-actions {
  display: flex;
  gap: .5rem;
  align-items: flex-end;
  margin-left: auto;
}

/* ============================================================
   Table
   ============================================================ */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .875rem;
}

thead tr {
  background: #f1f4f8;
  border-bottom: 1px solid var(--color-border);
}

th {
  padding: .65rem 1rem;
  text-align: left;
  font-size: .75rem;
  font-weight: 700;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  white-space: nowrap;
}

td {
  padding: .7rem 1rem;
  border-bottom: 1px solid #edf0f4;
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }

tbody tr:hover td { background: #f8fafc; }

.col-title   { min-width: 200px; }
.col-dept    { min-width: 200px; }
.col-meta    { white-space: nowrap; }
.col-actions { width: 80px; text-align: right; white-space: nowrap; }

/* ============================================================
   Status badges
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .2rem .6rem;
  border-radius: 99px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .03em;
  white-space: nowrap;
  cursor: default;
}

.badge-uploaded    { background: var(--color-muted-bg);   color: var(--color-muted);   }
.badge-preprocessing { background: var(--color-info-bg);  color: var(--color-info);    }
.badge-indexing    { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-ready       { background: var(--color-success-bg); color: var(--color-success); }
.badge-error       { background: var(--color-danger-bg);  color: var(--color-danger);  }

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .5rem 1rem;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background .15s, border-color .15s, color .15s;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color:#fff; text-decoration:none; }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover { background: #f1f4f8; text-decoration:none; }

.btn-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: #f5a5a5;
}
.btn-danger:hover { background: #fbd5d5; text-decoration:none; }

.btn-sm { padding: .3rem .7rem; font-size: .8rem; }

.btn-block { width: 100%; justify-content: center; }

/* ============================================================
   Forms
   ============================================================ */

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  margin-bottom: .35rem;
}

.form-group .hint {
  font-size: .78rem;
  color: var(--color-muted);
  margin-top: .25rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: var(--font);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,87,168,.15);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23546e7a' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.25rem;
}

textarea { resize: vertical; min-height: 90px; }

/* ============================================================
   Alerts
   ============================================================ */

.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  font-size: .9rem;
  margin-bottom: 1rem;
}

.alert-error   { background: var(--color-danger-bg);  color: var(--color-danger);  border: 1px solid #f5c6c6; }
.alert-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid #a3e6b8; }
.alert-info    { background: var(--color-info-bg);    color: var(--color-info);    border: 1px solid #a8c8f0; }
.alert-warning { background: var(--color-warning-bg); color: var(--color-warning); border: 1px solid #ffe082; }

/* ============================================================
   Pagination
   ============================================================ */

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 1rem;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 0 0 var(--radius) var(--radius);
  font-size: .85rem;
  color: var(--color-muted);
  flex-wrap: wrap;
  gap: .5rem;
}

.pagination-pages {
  display: flex;
  gap: .25rem;
}

.pagination-pages a,
.pagination-pages span {
  padding: .3rem .65rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
  font-size: .82rem;
  transition: background .12s;
}
.pagination-pages a:hover { background: #f1f4f8; text-decoration:none; }
.pagination-pages .current { background: var(--color-primary); color:#fff; border-color: var(--color-primary); }
.pagination-pages .disabled { color: var(--color-border); pointer-events: none; }

/* ============================================================
   Empty state
   ============================================================ */

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-muted);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: .75rem; }
.empty-state-title { font-size: 1.1rem; font-weight: 600; margin-bottom: .4rem; color: var(--color-text); }
.empty-state-sub   { font-size: .875rem; }

/* ============================================================
   Department path breadcrumb (in table)
   ============================================================ */

.dept-path {
  display: flex;
  align-items: center;
  gap: .3rem;
  flex-wrap: wrap;
  font-size: .8rem;
  color: var(--color-muted);
}
.dept-path .sep { color: #ccc; }
.dept-path .leaf { color: var(--color-text); font-weight: 600; }

/* ============================================================
   Login page
   ============================================================ */

.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0c2d5c 0%, #1a5ea8 100%);
}

.login-container {
  background: var(--color-surface);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,.25);
  padding: 2.5rem 2.25rem;
  width: 100%;
  max-width: 420px;
}

.login-container h1 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: .25rem;
  color: var(--color-nav-bg);
}

.login-subtitle {
  font-size: .85rem;
  color: var(--color-muted);
  margin-bottom: 1.75rem;
}

/* ============================================================
   Utilities
   ============================================================ */

.text-muted   { color: var(--color-muted); }
.text-small   { font-size: .8rem; }
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.fw-bold      { font-weight: 700; }
.d-flex       { display: flex; }
.align-center { align-items: center; }
.gap-sm       { gap: .5rem; }
.gap-md       { gap: 1rem; }
.mt-1         { margin-top: .5rem; }
.mt-2         { margin-top: 1rem; }
.mb-1         { margin-bottom: .5rem; }
.mb-2         { margin-bottom: 1rem; }
.ms-auto      { margin-left: auto; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  .nav-links .nav-link span { display: none; }
  .page { padding: 1rem; }
  .filter-bar { flex-direction: column; }
  .filter-group { min-width: 100%; }
  th, td { padding: .55rem .75rem; }
}