:root{
  --ink:#1A1A1A;
  --ink-soft:#2B2B2B;
  --paper:#FAF6EE;
  --paper-raised:#FFFFFF;
  --paper-deep:#EFE3C8;
  --brass:#A9793D;
  --brass-dark:#8A5F2C;
  --line:#D8CEBB;
  --success:#5C7A5E;
  --danger:#A5453B;
  --radius:10px;
  --header-bg:#1B2A41;
  --header-text:#FAF6EE;
}

[data-theme="dark"]{
  --ink:#EDE6D6;
  --ink-soft:#A79E8C;
  --paper:#14171A;
  --paper-raised:#1E232B;
  --paper-deep:#0A1A2E;
  --brass:#C9963F;
  --brass-dark:#E3B15C;
  --line:#333B47;
  --success:#7FAE82;
  --danger:#D97166;
}

*{box-sizing:border-box;}

[hidden]{ display:none !important; }

html{
  min-height:100%;
}
body{
  margin:0;
  min-height:100vh;
  background:linear-gradient(160deg, var(--paper) 0%, var(--paper) 55%, var(--paper-deep) 130%);
  background-attachment:fixed;
  color:var(--ink);
  font-family:'Cairo', sans-serif;
  line-height:1.6;
  transition:background-color .2s, color .2s;
}

h1,h2,h3{
  font-family:'Markazi Text', serif;
  font-weight:700;
  margin:0;
}

.wrap{
  max-width:1100px;
  margin:0 auto;
  padding:0 24px;
}
.wrap.narrow{ max-width:560px; }

/* Header */
.site-header{
  background:var(--header-bg);
  color:var(--header-text);
  padding:20px 0;
  border-bottom:4px solid var(--brass);
}
.header-inner{
  display:flex;
  flex-direction:row-reverse;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
}
.brand{ display:flex; align-items:center; gap:14px; }
.brand-mark{
  font-family:'Markazi Text', serif;
  font-weight:700;
  font-size:28px;
  background:var(--brass);
  color:var(--header-bg);
  padding:6px 14px;
  border-radius:6px;
  letter-spacing:1px;
}
.brand-text h1{ font-size:26px; color:var(--header-text); }
.brand-text p{ margin:2px 0 0; font-size:14px; color:#C9D2DD; }

.theme-toggle, .icon-link{
  background:none;
  border:1px solid var(--brass);
  color:var(--header-text);
  border-radius:50%;
  width:38px;
  height:38px;
  font-size:17px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:background .2s;
  flex-shrink:0;
  text-decoration:none;
}
.theme-toggle:hover, .icon-link:hover{ background:var(--brass); color:var(--header-bg); }

/* Drawer label / search section */
.drawer-label{
  margin:32px 0 20px;
}
.eyebrow{
  color:var(--brass-dark);
  font-weight:700;
  letter-spacing:2px;
  font-size:13px;
  margin:0 0 4px;
  text-transform:uppercase;
}
.drawer-label h2{
  font-size:34px;
  margin-bottom:18px;
}

.search-bar{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:14px;
  box-shadow:0 2px 0 var(--line);
}
.search-bar select, .search-bar input{
  font-family:'Cairo', sans-serif;
  font-size:15px;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:6px;
  background:var(--paper);
  color:var(--ink);
}
.search-bar select{ flex:0 0 180px; }
.search-bar input{ flex:1; min-width:220px; }

.search-field{
  position:relative;
}
.search-field .search-icon{
  position:absolute;
  top:50%;
  right:16px;
  transform:translateY(-50%);
  width:18px;
  height:18px;
  color:var(--ink-soft);
  pointer-events:none;
}
.search-field input{
  width:100%;
  font-family:'Cairo', sans-serif;
  font-size:15px;
  padding:13px 46px 13px 16px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--paper-raised);
  color:var(--ink);
  transition:border-color .2s, box-shadow .2s;
}
.search-field input:focus{
  outline:none;
  border-color:var(--brass);
  box-shadow:0 0 0 3px rgba(169,121,61,0.18);
}
.search-field input::placeholder{
  color:var(--ink-soft);
}

.or-divider{
  display:flex;
  align-items:center;
  gap:14px;
  margin:22px 0 4px;
  color:var(--ink-soft);
  font-size:12px;
}
.or-divider::before, .or-divider::after{
  content:'';
  flex:1;
  height:1px;
  background:var(--line);
}
.search-bar input:focus, .search-bar select:focus{
  outline:2px solid var(--brass);
  outline-offset:1px;
}

.level-picker{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.level-btn, .semester-btn, .spec-btn{
  flex:1;
  min-width:150px;
  background:var(--paper-raised);
  border:1px solid var(--line);
  color:var(--ink);
  font-family:'Cairo', sans-serif;
  font-weight:600;
  font-size:16px;
  padding:16px;
  border-radius:var(--radius);
  cursor:pointer;
  transition:all .2s;
  box-shadow:0 2px 0 var(--line);
}
.level-btn:hover, .semester-btn:hover, .spec-btn:hover{ border-color:var(--brass); color:var(--brass-dark); }
.level-btn.active, .semester-btn.active, .spec-btn.active{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper);
}

.chosen-level-bar{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
  color:var(--ink-soft);
  font-size:14px;
}
.change-level-btn{
  background:none;
  border:1px solid var(--line);
  color:var(--brass-dark);
  padding:5px 12px;
  border-radius:20px;
  font-family:'Cairo', sans-serif;
  font-size:13px;
  cursor:pointer;
}
.change-level-btn:hover{ border-color:var(--brass); }

.search-hint{
  text-align:center;
  color:var(--ink-soft);
  padding:30px 0;
}

.material-card .meta-line{
  font-size:12px;
  color:var(--brass-dark);
  font-weight:600;
  margin:0 0 8px;
}

.category-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.category-block{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 2px 0 var(--line);
}
.category-btn{
  width:100%;
  text-align:right;
  background:none;
  border:none;
  padding:16px;
  font-family:'Cairo', sans-serif;
  font-weight:700;
  font-size:17px;
  color:var(--ink);
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.category-btn:hover{ color:var(--brass-dark); }
.category-btn .arrow{ transition:transform .2s; color:var(--brass); }
.category-block.open .category-btn .arrow{ transform:rotate(180deg); }

.subject-menu{
  display:none;
  border-top:1px solid var(--line);
  padding:8px;
  flex-direction:column;
  gap:4px;
}
.category-block.open .subject-menu{ display:flex; }
.subject-menu-item{
  text-align:right;
  background:none;
  border:none;
  padding:10px 12px;
  border-radius:6px;
  font-family:'Cairo', sans-serif;
  font-size:15px;
  color:var(--ink-soft);
  cursor:pointer;
}
.subject-menu-item:hover{ background:var(--paper); color:var(--brass-dark); }
.subject-menu-empty{
  padding:10px 12px;
  color:var(--ink-soft);
  font-size:14px;
}
.new-badge{
  background:var(--success);
  color:#fff;
  font-size:10px;
  font-weight:700;
  padding:2px 6px;
  border-radius:4px;
  margin-inline-start:6px;
}

.results-meta{
  color:var(--ink-soft);
  font-size:14px;
  margin-bottom:14px;
}

/* Card grid - index card catalog look */
.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(240px, 1fr));
  gap:20px;
  margin-bottom:40px;
}

.index-card{
  position:relative;
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:4px 4px 8px 8px;
  padding:20px 18px 18px;
  box-shadow:0 3px 0 var(--line);
}

.card-tab{
  position:absolute;
  top:-13px;
  right:16px;
  background:var(--brass);
  color:var(--paper);
  font-size:12px;
  font-weight:700;
  padding:4px 12px;
  border-radius:4px;
}

.material-card h3{
  font-size:22px;
  margin:10px 0 4px;
}
.material-card .desc{
  color:var(--ink-soft);
  font-size:14px;
  margin:0 0 6px;
}
.material-card .filename{
  font-size:13px;
  color:var(--ink-soft);
  border-top:1px dashed var(--line);
  padding-top:8px;
  margin:10px 0 14px;
  word-break:break-word;
}

.download-btn{
  display:inline-block;
  width:100%;
  text-align:center;
  background:var(--ink);
  color:var(--paper);
  padding:10px 14px;
  border-radius:6px;
  text-decoration:none;
  font-weight:600;
  font-size:14px;
  transition:background .2s;
}
.download-btn:hover{ background:var(--brass-dark); }

.empty-state, .loading-state{
  text-align:center;
  color:var(--ink-soft);
  padding:40px 0;
}

/* Footer */
.site-footer{
  border-top:1px solid var(--line);
  padding:20px 0 24px;
  color:var(--ink-soft);
}

.footer-credits {
  display:flex;
  justify-content:center;
  align-items:center;
  gap:24px;
  text-align:center;
}

.credit-item {
  display:flex;
  flex-direction:column;
  gap:2px;
}

.credit-title {
  font-size:12px;
  color:var(--brass-dark);
  font-weight:600;
}

.credit-name {
  font-size:15px;
  color:var(--ink);
  font-weight:700;
}

.credit-divider {
  width:1px;
  height:28px;
  background-color:var(--line);
}

/* Admin page */
.dashboard-grid{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
  margin-top:40px;
}
.dashboard-card{
  display:block;
  flex:1 1 220px;
  text-decoration:none;
  transition:transform .15s, border-color .15s;
}
.dashboard-card:hover{
  transform:translateY(-2px);
  border-color:var(--brass);
}
.dashboard-card h2{ font-size:24px; margin:8px 0 4px; }
.dashboard-grid .btn-ghost{
  flex:1 1 100%;
}

.login-card, #uploadCard{
  margin-top:50px;
}
.card-sub{
  color:var(--ink-soft);
  font-size:14px;
  margin:6px 0 18px;
}
form label{
  display:block;
  font-size:14px;
  font-weight:600;
  margin:14px 0 6px;
}
.toggle-row{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:8px;
  padding:10px 14px;
}
.toggle-row label{
  display:flex !important;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:400;
  margin:0;
  cursor:pointer;
}
.toggle-row input[type="radio"]{
  width:16px;
  height:16px;
  accent-color:var(--brass);
  cursor:pointer;
}
.checkbox-label{
  display:flex !important;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  margin:18px 0 6px;
  cursor:pointer;
}
.checkbox-label input[type="checkbox"]{
  width:17px;
  height:17px;
  accent-color:var(--brass);
  cursor:pointer;
}
.shared-options-list{
  display:flex;
  flex-direction:column;
  gap:8px;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:8px;
  padding:12px 14px;
}
.shared-options-list label{
  display:flex !important;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:400;
  margin:0;
  cursor:pointer;
}
.shared-options-list input[type="checkbox"]{
  width:16px;
  height:16px;
  accent-color:var(--brass);
  cursor:pointer;
}
form input, form select{
  width:100%;
  font-family:'Cairo', sans-serif;
  font-size:15px;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:6px;
  background:var(--paper);
  color:var(--ink);
}
form input:focus, form select:focus{
  outline:2px solid var(--brass);
  outline-offset:1px;
}

.btn-primary{
  margin-top:20px;
  width:100%;
  background:var(--brass);
  color:var(--ink);
  border:none;
  font-family:'Cairo', sans-serif;
  font-weight:700;
  font-size:15px;
  padding:12px;
  border-radius:6px;
  cursor:pointer;
  transition:background .2s;
}
.btn-primary:hover{ background:var(--brass-dark); color:var(--paper); }
.btn-primary:disabled{ opacity:.6; cursor:not-allowed; }

.btn-ghost{
  margin-top:14px;
  width:100%;
  background:transparent;
  border:1px solid var(--line);
  color:var(--ink-soft);
  font-family:'Cairo', sans-serif;
  padding:10px;
  border-radius:6px;
  cursor:pointer;
}
.btn-ghost:hover{ border-color:var(--danger); color:var(--danger); }

.error-text{ color:var(--danger); font-size:14px; margin-top:10px; }
.status-text{ font-size:14px; margin-top:10px; }
.status-text.success{ color:var(--success); }
.status-text.error{ color:var(--danger); }

.drive-instructions{
  background:var(--paper);
  border:1px dashed var(--line);
  border-radius:8px;
  padding:14px 16px;
  margin-top:20px;
  font-size:13px;
  color:var(--ink-soft);
}
.drive-instructions p{ margin:0 0 6px; color:var(--ink); }
.drive-instructions ol{ margin:0; padding-inline-start:20px; }
.drive-instructions li{ margin-bottom:4px; }

.manage-section{ margin-top:50px; }
.manage-item{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:6px;
  padding:14px 16px;
  margin-bottom:10px;
}
.manage-item .subject-name{
  font-family:'Markazi Text', serif;
  font-weight:700;
  font-size:19px;
  color:var(--ink);
  margin:0 0 2px;
}
.manage-item .file-name{
  font-size:14px;
  color:var(--ink-soft);
  margin:0 0 6px;
}
.manage-item .meta{
  color:var(--ink-soft);
  font-size:12px;
  margin:0 0 10px;
}
.manage-item .manage-actions{
  display:flex;
  gap:8px;
}
.delete-btn{
  background:none;
  border:1px solid var(--danger);
  color:var(--danger);
  border-radius:5px;
  padding:5px 10px;
  cursor:pointer;
  font-family:'Cairo', sans-serif;
  font-size:13px;
}
.delete-btn:hover{ background:var(--danger); color:#fff; }

@media (max-width:600px){
  .search-bar{ flex-direction:column; }
  .search-bar select{ flex:1; }
  .footer-credits {
    flex-direction:column;
    gap:12px;
  }
  .credit-divider {
    width:40px;
    height:1px;
  }
}