/* ==========================================================
   CENTRAL LEARNING HUB V5
   Clean AWS-inspired UI + modern iOS-like spacing
========================================================== */

:root{
    --dark:#161d26;
    --dark-2:#243143;
    --gold:#f4b400;
    --gold-dark:#d99d00;
    --gold-soft:#fff7d6;
    --aqua:#dff7f3;
    --aqua-2:#b8ede5;
    --blue:#2f6fed;
    --blue-soft:#eef4ff;
    --page:#f7f8fa;
    --white:#fff;
    --text:#182230;
    --muted:#667085;
    --border:#dfe3e8;
    --border-soft:#edf0f3;
    --success:#067647;
    --success-bg:#ecfdf3;
    --danger:#b42318;
    --danger-bg:#fef3f2;
    --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 20px rgba(16,24,40,.06);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    background:var(--page);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
    font-size:15px;
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
}

/* Top bar */
.topbar{
    min-height:72px;
    background:#fff;
    border-bottom:1px solid var(--border);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:0 28px;
    position:sticky;
    top:0;
    z-index:1000;
}
.topbar-left{display:flex;align-items:center;gap:28px;min-width:0}
.brand{
    display:flex;align-items:center;gap:12px;
    color:inherit;text-decoration:none;min-width:0;
}
.brand-mark{
    width:46px;height:46px;border-radius:12px;
    background:var(--dark);color:#fff;
    display:grid;place-items:center;
    font-size:20px;font-weight:800;
    position:relative;flex:0 0 auto;
}
.brand-mark::after{
    content:"";position:absolute;bottom:6px;
    width:22px;height:4px;border-radius:999px;background:var(--gold);
}
.brand-copy{display:flex;flex-direction:column;min-width:0}
.brand-copy strong{font-size:16px;letter-spacing:-.25px;white-space:nowrap}
.brand-copy small{color:var(--muted);font-size:11px;white-space:nowrap}
.primary-nav{display:flex;align-items:center;gap:4px}
.primary-nav a{
    text-decoration:none;color:#344054;
    padding:10px 12px;border-radius:9px;font-weight:600;font-size:14px;
}
.primary-nav a:hover{background:#f2f4f7}
.primary-nav a.active{background:var(--gold-soft);color:var(--dark)}
.topbar-user{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.user-copy{text-align:right;display:flex;flex-direction:column}
.user-copy strong{font-size:13px}
.user-copy span{font-size:11px;color:var(--muted)}
.user-avatar{
    width:40px;height:40px;border-radius:50%;
    background:var(--dark);color:#fff;
    display:grid;place-items:center;font-weight:700;
}

/* Secondary nav */
.subnav-wrap{padding:16px 28px 0}
.subnav{
    max-width:1320px;margin:auto;
    background:#fff;border:1px solid var(--border);border-radius:18px;
    min-height:60px;padding:8px 16px;
    display:flex;align-items:center;gap:6px;
    overflow-x:auto;box-shadow:0 1px 2px rgba(16,24,40,.03);
}
.subnav-title{
    white-space:nowrap;padding-right:20px;margin-right:6px;border-right:1px solid var(--border)
}
.subnav a{
    white-space:nowrap;text-decoration:none;color:#344054;
    padding:9px 12px;border-radius:9px;font-size:13px;font-weight:600;
}
.subnav a:hover{background:#f6f7f9}
.subnav-signout{margin-left:auto}

/* Shell */
.main-shell{max-width:1320px;margin:auto;padding:30px 28px 60px}
.page-header{
    display:flex;align-items:flex-start;justify-content:space-between;
    gap:20px;margin-bottom:22px;
}
.page-header h1{margin:0;font-size:30px;line-height:1.2;letter-spacing:-.65px}
.page-header p{margin:7px 0 0;color:var(--muted)}
.hero-strip{
    background:linear-gradient(110deg,#e4fbf7 0%,#dff7f3 48%,#fbfffe 100%);
    border:1px solid #c7eee7;border-radius:20px;padding:32px;margin-bottom:24px;
}
.hero-strip h1{margin:0;font-size:34px;letter-spacing:-.8px}
.hero-strip p{max-width:850px;color:#344054;margin:12px 0 0}

/* Buttons */
button,.btn{
    min-height:43px;
    display:inline-flex;align-items:center;justify-content:center;gap:7px;
    border:0;border-radius:999px;
    padding:9px 17px;
    background:var(--dark);color:#fff;
    font:inherit;font-weight:700;font-size:14px;
    text-decoration:none;cursor:pointer;transition:.18s ease;
}
button:hover,.btn:hover{background:var(--dark-2);transform:translateY(-1px)}
.btn-gold{background:var(--gold);color:#15191f}
.btn-gold:hover{background:var(--gold-dark)}
.btn-light{background:#fff;color:#344054;border:1px solid var(--border)}
.btn-outline{background:#fff;color:var(--dark);border:2px solid var(--dark)}
.btn-danger{background:#d92d20}
.btn-danger:hover{background:#b42318}

/* Cards */
.card{
    background:#fff;border:1px solid var(--border);border-radius:17px;
    padding:22px;margin-bottom:20px;
    box-shadow:0 1px 2px rgba(16,24,40,.025);
}
.card h2{margin:0 0 18px;font-size:20px;letter-spacing:-.25px}
.card-header{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px}

/* Grids */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:15px}
.stat-card{
    background:#fff;border:1px solid var(--border);border-radius:15px;padding:20px;
    position:relative;overflow:hidden;min-height:126px;
}
.stat-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:5px;background:var(--gold)}
.stat-card:nth-child(2)::before{background:#67d9cd}
.stat-card:nth-child(3)::before{background:var(--blue)}
.stat-label{font-size:13px;color:var(--muted);font-weight:650}
.stat{font-size:32px;font-weight:760;margin-top:10px}
.stat-small{font-size:12px;color:#98a2b3;margin-top:10px}

/* Form */
label{display:block;margin:14px 0 7px;font-size:13px;font-weight:650;color:#344054}
input,select,textarea{
    width:100%;min-height:44px;
    padding:10px 12px;border:1px solid #cfd5df;border-radius:10px;
    background:#fff;color:var(--text);font:inherit;outline:none;
}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{
    border-color:var(--blue);
    box-shadow:0 0 0 3px rgba(47,111,237,.10);
}

/* Tables */
.table-wrap{width:100%;overflow-x:auto;border:1px solid var(--border);border-radius:13px}
table{width:100%;border-collapse:collapse;background:#fff}
thead{background:#f9fafb}
th{
    padding:13px 15px;text-align:left;
    font-size:12px;text-transform:uppercase;letter-spacing:.35px;color:#475467;
    border-bottom:1px solid var(--border);
}
td{padding:14px 15px;border-bottom:1px solid var(--border-soft);color:#344054}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fcfdfd}

/* Badges */
.badge{
    display:inline-flex;align-items:center;
    padding:4px 9px;border-radius:999px;
    font-size:11px;font-weight:700;
}
.badge-active,.badge-free{background:var(--success-bg);color:var(--success)}
.badge-inactive{background:#f2f4f7;color:#475467}
.badge-public{background:var(--blue-soft);color:var(--blue)}
.badge-private{background:#f4f3ff;color:#6941c6}
.badge-paid{background:var(--gold-soft);color:#7a4b00}
.badge-blocked{background:var(--danger-bg);color:var(--danger)}

/* Notices */
.notice{padding:13px 15px;margin-bottom:20px;border-radius:10px;background:var(--aqua);border:1px solid var(--aqua-2);color:#145c55}
.notice-success{background:var(--success-bg);color:var(--success);border-color:#abefc6}
.notice-error{background:var(--danger-bg);color:var(--danger);border-color:#fecdca}

/* Upload */
.upload-zone{
    border:2px dashed #aab4c0;border-radius:18px;background:linear-gradient(180deg,#fff,#fbfcfd);
    padding:36px;text-align:center;cursor:pointer;transition:.18s ease;
}
.upload-zone.dragover{border-color:var(--blue);background:var(--blue-soft);transform:translateY(-1px)}
.upload-zone input[type=file]{display:none!important}
.upload-zone h3{margin:0 0 8px;font-size:20px}
.upload-zone p{margin:0;color:var(--muted)}
.drop-icon{font-size:34px;margin-bottom:10px}
.upload-queue{display:grid;gap:10px;margin-top:18px}
.queue-item{
    display:grid;grid-template-columns:minmax(0,1fr) 120px 120px;gap:12px;align-items:center;
    padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:#fff;
}
.queue-name{font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.queue-meta{font-size:12px;color:var(--muted)}
.queue-status{text-align:right;font-size:12px;font-weight:700;color:var(--success)}

/* Content */
.content-toolbar{display:flex;gap:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;margin-bottom:18px}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.content-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.content-card{
    background:#fff;border:1px solid var(--border);border-radius:15px;overflow:hidden;position:relative;
    transition:.18s ease;
}
.content-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.content-preview{
    height:132px;background:linear-gradient(135deg,#eef4ff,#e5faf6);
    display:grid;place-items:center;font-size:34px;font-weight:800;color:var(--dark);
    border-bottom:1px solid var(--border);
}
.content-body{padding:14px}
.content-title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.content-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.drag-handle{
    position:absolute;top:10px;right:10px;
    width:34px;height:34px;border-radius:9px;
    background:rgba(255,255,255,.94);border:1px solid var(--border);
    color:var(--dark);padding:0;cursor:grab;
}

/* Collections */
.collection-toolbar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:18px
}
.collection-grid{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px
}
.collection-card{
    background:#fff;border:1px solid var(--border);border-radius:17px;padding:18px;
    min-height:180px;display:flex;flex-direction:column;justify-content:space-between;
    transition:.18s ease;
}
.collection-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.collection-card h3{margin:0;font-size:19px}
.collection-card p{margin:8px 0 0;color:var(--muted);font-size:13px}
.collection-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.collection-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}

.collection-builder{
    display:grid;grid-template-columns:minmax(280px,.75fr) minmax(0,1.25fr);gap:18px
}
.library-panel,.collection-panel{
    background:#fff;border:1px solid var(--border);border-radius:17px;padding:18px;min-width:0
}
.panel-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.panel-title h2{margin:0;font-size:19px}
.drop-list{display:grid;gap:10px;min-height:140px}
.drop-list.is-over{
    outline:2px dashed var(--blue);outline-offset:6px;border-radius:12px;background:var(--blue-soft)
}
.resource-item{
    display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:10px;align-items:center;
    padding:11px 12px;border:1px solid var(--border);border-radius:12px;background:#fff;
}
.resource-item[draggable=true]{cursor:grab}
.resource-icon{
    width:36px;height:36px;border-radius:10px;background:var(--aqua);
    display:grid;place-items:center;font-size:12px;font-weight:800;color:var(--dark)
}
.resource-title{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.resource-sub{font-size:12px;color:var(--muted)}
.resource-actions{display:flex;gap:6px}
.move-btn{
    min-height:34px;padding:6px 10px;font-size:12px;border-radius:9px;background:#fff;color:#344054;border:1px solid var(--border)
}

/* Details modal */
.details-modal{
    position:fixed;inset:0;background:rgba(16,24,40,.45);
    display:flex;align-items:center;justify-content:center;padding:20px;z-index:2000
}
.details-modal[hidden]{display:none}
.details-dialog{
    width:min(680px,100%);max-height:85vh;overflow:auto;
    background:#fff;border-radius:20px;padding:26px;box-shadow:0 24px 70px rgba(16,24,40,.28);position:relative
}
.details-close{
    position:absolute;right:18px;top:16px;width:40px;height:40px;border-radius:50%;
    background:#f2f4f7;color:var(--dark);padding:0;font-size:24px
}

/* Responsive */
@media(max-width:1000px){
    .primary-nav{display:none}
    .collection-builder{grid-template-columns:1fr}
}
@media(max-width:700px){
    .topbar{padding:10px 14px}
    .brand-copy small,.user-copy{display:none}
    .subnav-wrap{padding:10px}
    .subnav{border-radius:12px}
    .main-shell{padding:22px 14px 45px}
    .page-header{display:block}
    .page-header .btn{margin-top:12px}
    .hero-strip{padding:24px 18px}
    .hero-strip h1{font-size:28px}
    .queue-item{grid-template-columns:1fr}
    .queue-status{text-align:left}
}