:root{
  --bg:#0b0e14; --bg-soft:#10141d; --panel:#141925; --panel-2:#1a2030;
  --panel-3:#202840; --border:#232c42; --border-soft:#1b2235;
  --text:#eef2f9; --muted:#8b97b3; --muted-2:#6b7799;
  --brand:#4c9eff; --brand-2:#2f7bed; --brand-ink:#0a1422;
  --danger:#f4566e; --ok:#28c499; --warn:#f6b73c;
  --radius:16px; --radius-sm:11px;
  --shadow:0 18px 44px -18px rgba(0,0,0,.7);
  --ring:0 0 0 3px rgba(76,158,255,.22);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:
    radial-gradient(900px 480px at 88% -8%, rgba(47,123,237,.16), transparent 60%),
    radial-gradient(700px 460px at 0% 0%, rgba(40,196,153,.07), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  font-size:15px; line-height:1.55; -webkit-font-smoothing:antialiased;
  min-height:100dvh;
}
a{color:inherit;text-decoration:none}
h1{font-size:clamp(22px,4vw,28px);font-weight:800;letter-spacing:-.02em;margin:0 0 6px}
h2{font-size:19px;font-weight:700;letter-spacing:-.01em;margin:0}
h3{font-size:16.5px;font-weight:700;margin:0 0 6px}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.clamp{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:60;
  background:rgba(11,14,20,.72);backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--border-soft);
}
.topbar-inner{
  max-width:1200px;margin:0 auto;padding:0 20px;height:64px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:700;letter-spacing:-.01em}
.brand-icon{
  font-size:20px;width:38px;height:38px;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(140deg,#1d2840,#141a2a);border:1px solid var(--border);
}
.brand-text strong{color:var(--brand);font-weight:800}

.nav{display:flex;align-items:center;gap:6px}
.navlink{
  display:inline-flex;align-items:center;gap:8px;padding:9px 14px;border-radius:11px;
  color:var(--muted);font-weight:600;font-size:14px;transition:.16s;
}
.navlink-ic{font-size:15px}
.navlink:hover{background:var(--panel);color:var(--text)}
.navlink.active{background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 6px 16px -6px rgba(76,158,255,.6)}

.lang-switch{display:inline-flex;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:3px;margin:0 4px}
.lang-switch a{padding:5px 11px;border-radius:8px;font-size:12.5px;font-weight:700;color:var(--muted);letter-spacing:.04em}
.lang-switch a.active{background:var(--panel-3);color:#fff}

.logout-form{margin:0}
.btn-logout{padding:8px 14px;font-size:13.5px}

/* Hamburger */
.hamburger{display:none;width:42px;height:42px;border:1px solid var(--border);background:var(--panel);
  border-radius:11px;cursor:pointer;padding:0;position:relative}
.hamburger span{position:absolute;left:11px;right:11px;height:2px;background:var(--text);border-radius:2px;transition:.22s}
.hamburger span:nth-child(1){top:14px}
.hamburger span:nth-child(2){top:20px}
.hamburger span:nth-child(3){top:26px}
.hamburger.active span:nth-child(1){top:20px;transform:rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){top:20px;transform:rotate(-45deg)}
.nav-backdrop{display:none}

/* ---------- Layout ---------- */
.container{max-width:1200px;margin:0 auto;padding:30px 20px 90px}
.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:22px;flex-wrap:wrap}
.page-head .muted{max-width:62ch}
.head-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.head-actions form{margin:0}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);margin-bottom:16px;font-weight:600;font-size:14px}
.back:hover{color:var(--text)}

/* ---------- Buttons ---------- */
.btn-primary,.btn-ghost,.btn-danger{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  border:none;cursor:pointer;font-size:14px;font-weight:700;font-family:inherit;
  padding:11px 19px;border-radius:12px;transition:.16s;white-space:nowrap;
}
.btn-primary{background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 10px 22px -10px rgba(76,158,255,.65)}
.btn-primary:hover{filter:brightness(1.07);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary.block{width:100%}
.btn-ghost{background:var(--panel-2);color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--brand)}
.btn-danger{background:transparent;color:var(--danger);border:1px solid color-mix(in srgb,var(--danger) 55%,transparent)}
.btn-danger:hover{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-sm{
  font-size:12.5px;font-weight:700;padding:7px 13px;border-radius:9px;
  background:var(--panel-2);border:1px solid var(--border);color:var(--text);cursor:pointer;font-family:inherit;transition:.15s;
}
.btn-sm:hover{border-color:var(--brand)}
.btn-sm.primary{background:var(--panel-3);border-color:transparent;color:var(--brand)}
.btn-sm.primary:hover{background:var(--brand);color:#fff}
.btn-sm.danger{color:var(--danger);border-color:transparent;background:transparent}
.btn-sm.danger:hover{background:var(--danger);color:#fff}

/* ---------- Inputs ---------- */
input,textarea,select{
  width:100%;background:var(--bg-soft);border:1px solid var(--border);color:var(--text);
  padding:12px 14px;border-radius:11px;font-size:14.5px;font-family:inherit;outline:none;transition:.15s;
}
input::placeholder,textarea::placeholder{color:var(--muted-2)}
input:focus,textarea:focus,select:focus{border-color:var(--brand);box-shadow:var(--ring)}
textarea{resize:vertical}
select{appearance:none;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 fill='%238b97b3' d='M6 8 0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}

/* Search */
.search{position:relative;display:flex;gap:10px;margin-bottom:24px;max-width:560px}
.search-ic{position:absolute;left:14px;top:50%;transform:translateY(-50%);opacity:.6;font-size:14px;pointer-events:none}
.search input{flex:1;padding-left:40px}

/* ---------- Topic grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:18px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.18s;display:block}
.card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--brand) 55%,var(--border));box-shadow:var(--shadow)}
.topic-thumb{position:relative;height:128px;display:grid;place-items:center;
  background:radial-gradient(120px 80px at 70% 20%,rgba(76,158,255,.22),transparent),linear-gradient(140deg,#1b2840,#131a2c)}
.topic-thumb-ic{font-size:46px;filter:drop-shadow(0 6px 14px rgba(0,0,0,.5))}
.topic-thumb-badge{position:absolute;top:10px;right:10px;background:rgba(10,14,22,.7);backdrop-filter:blur(6px);
  border:1px solid var(--border);color:#fff;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:20px}
.card-body{padding:16px}
.card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:12px}
.badge{background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;font-size:11.5px;font-weight:700;padding:3px 11px;border-radius:20px}
.badge.soft{background:var(--panel-3);color:var(--brand);border:1px solid var(--border)}

/* ---------- Breadcrumb ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin-bottom:14px;font-size:13.5px;color:var(--muted)}
.crumbs a{color:var(--muted);font-weight:600;padding:3px 6px;border-radius:7px}
.crumbs a:hover{background:var(--panel);color:var(--text)}
.crumbs a:last-child{color:var(--text)}
.crumbs .sep{opacity:.4}

/* ---------- Aksiyon kutulari (klasor/yukle/duzenle) ---------- */
.box{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;margin-bottom:20px}
.box[hidden]{display:none}
.inline-form{display:flex;gap:10px;flex-wrap:wrap}
.inline-form input[type=text]{flex:1;min-width:160px}

/* ---------- Klasor kartlari ---------- */
.folder-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-bottom:22px}
.folder-card{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-sm);transition:.15s}
.folder-card:hover{border-color:var(--brand);transform:translateY(-2px)}
.folder-link{display:flex;align-items:center;gap:13px;padding:15px 16px}
.folder-ic{font-size:30px;flex:none}
.folder-info{display:flex;flex-direction:column;gap:2px;min-width:0}
.folder-name{font-weight:700;font-size:15px;word-break:break-word}
.folder-menu-btn{position:absolute;top:8px;right:8px;width:30px;height:30px;border:none;background:transparent;color:var(--muted);
  font-size:20px;cursor:pointer;border-radius:8px;line-height:1}
.folder-menu-btn:hover{background:var(--panel-3);color:var(--text)}
.folder-menu{margin:0 16px 14px}
.folder-menu summary{list-style:none}.folder-menu summary::-webkit-details-marker{display:none}
.folder-menu[open]{display:flex;flex-direction:column;gap:9px;padding-top:6px;border-top:1px solid var(--border)}

/* ---------- Paylas menusu ---------- */
.share-box{margin:0}
.share-box summary{list-style:none}.share-box summary::-webkit-details-marker{display:none}
.share-box[open]{margin-top:4px}
.share-row{display:flex;gap:8px;flex-wrap:wrap;padding-top:8px;border-top:1px solid var(--border)}
.share-act{width:42px;height:42px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);
  border-radius:10px;cursor:pointer;font-size:17px;display:grid;place-items:center;transition:.14s}
.share-act:hover{border-color:var(--brand);transform:translateY(-2px)}
.share-act.x:hover{background:#000;color:#fff}
.share-act.tg:hover{background:#229ED9;color:#fff;border-color:#229ED9}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);z-index:200;
  background:var(--ok);color:#04231a;font-weight:700;padding:11px 20px;border-radius:30px;opacity:0;transition:.3s;box-shadow:var(--shadow)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Kapak fotografi ---------- */
.topic-thumb.has-cover{padding:0}
.topic-cover{width:100%;height:100%;object-fit:cover;display:block}

.lang-switch.big{padding:4px}
.lang-switch.big a{flex:1;text-align:center;padding:10px 14px;font-size:14px}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:22px}
.stat{display:flex;align-items:center;gap:13px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px}
.stat-ic{font-size:24px;width:46px;height:46px;flex:none;display:grid;place-items:center;border-radius:12px;background:var(--panel-3)}
.stat b{display:block;font-size:21px;font-weight:800;letter-spacing:-.02em;line-height:1.1}
.stat small{color:var(--muted);font-size:12.5px;font-weight:600}

/* ---------- Toolbar (ara/sirala) ---------- */
.toolbar{display:flex;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.toolbar .search{flex:1;min-width:200px;margin:0}
.toolbar select{width:auto;min-width:130px}
.toolbar .btn-ghost{display:none}

/* ---------- Chips (tur filtresi) ---------- */
.chips{display:flex;gap:9px;margin-bottom:22px;flex-wrap:wrap}
.chip{display:inline-flex;align-items:center;gap:7px;background:var(--panel-2);border:1px solid var(--border);
  color:var(--muted);font-size:13px;font-weight:600;padding:7px 13px;border-radius:20px;transition:.14s}
.chip:hover{border-color:var(--brand);color:var(--text)}
.chip.active{background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
.chip-n{font-size:11px;background:rgba(255,255,255,.16);padding:1px 7px;border-radius:10px}
.chip:not(.active) .chip-n{background:var(--bg-soft)}

/* ---------- Tags / note ---------- */
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11.5px;font-weight:600;color:var(--brand);background:var(--panel-3);border:1px solid var(--border);padding:2px 9px;border-radius:14px}
.note{margin:0;line-height:1.45}

/* ---------- Edit paneller (details) ---------- */
.edit-panel,.file-edit{margin:0}
.edit-panel[open]{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:22px}
.edit-panel summary,.file-edit summary{list-style:none}
.edit-panel summary::-webkit-details-marker,.file-edit summary::-webkit-details-marker{display:none}
.file-edit[open]{margin-top:4px;padding-top:12px;border-top:1px solid var(--border)}
.file-edit .form{gap:9px}
.file-edit label{font-size:12px}
.row-actions{display:flex;gap:10px}

/* ---------- Empty ---------- */
.empty{text-align:center;padding:72px 20px;border:1px dashed var(--border);border-radius:var(--radius);background:rgba(20,25,37,.4)}
.empty-icon{font-size:58px;margin-bottom:12px;opacity:.9}
.empty h2{margin-bottom:14px}

/* ---------- Media grid ---------- */
.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.media{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.16s}
.media:hover{border-color:color-mix(in srgb,var(--brand) 40%,var(--border))}
.media-preview{position:relative;background:#06090f;aspect-ratio:16/10;display:grid;place-items:center;overflow:hidden}
.media-preview img,.media-preview video{width:100%;height:100%;display:block}
.media-preview img{object-fit:cover;transition:.3s}
.media:hover .media-preview img{transform:scale(1.04)}
.media-preview video{object-fit:contain;background:#000}
.ph{width:100%;height:100%;display:grid;place-items:center;font-size:50px;color:var(--muted)}
.ph.pdf{color:#ff7a7a}
.media-body{padding:14px;display:flex;flex-direction:column;gap:11px;flex:1}
.media-name{font-weight:600;font-size:14px;word-break:break-word;line-height:1.4}
.media-meta{display:flex;align-items:center;gap:8px;margin-top:auto}
.media-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.media-actions form{margin:0}
audio{width:100%;height:38px}

/* ---------- Panels / forms ---------- */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.panel-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.step-num{width:30px;height:30px;flex:none;display:grid;place-items:center;border-radius:9px;font-weight:800;font-size:14px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));color:#fff}
.form{display:flex;flex-direction:column;gap:15px}
.form label{display:flex;flex-direction:column;gap:7px;font-size:13px;color:var(--muted);font-weight:600}

/* Dropzone */
.dropzone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  border:2px dashed var(--border);border-radius:14px;padding:26px 18px;cursor:pointer;text-align:center;
  background:var(--bg-soft);transition:.16s;color:var(--muted)}
.dropzone:hover{border-color:var(--brand);color:var(--text)}
.dropzone.drag{border-color:var(--brand);background:rgba(76,158,255,.08);color:var(--text)}
.dropzone-ic{font-size:30px}
.dropzone-text{font-size:13.5px;font-weight:600}

.filelist{display:flex;flex-direction:column;gap:7px}
.filelist-item{display:flex;justify-content:space-between;gap:12px;background:var(--bg-soft);border:1px solid var(--border);border-radius:9px;padding:9px 13px;font-size:13px}
.fl-name{word-break:break-word}

.topic-list{display:flex;flex-direction:column;gap:9px}
.topic-row{display:flex;justify-content:space-between;align-items:center;gap:12px;background:var(--bg-soft);border:1px solid var(--border);border-radius:11px;padding:13px 16px;transition:.15s;font-weight:600}
.topic-row:hover{border-color:var(--brand);transform:translateX(3px)}

/* Progress */
.progress-wrap{display:flex;flex-direction:column;gap:7px}
.progress{height:11px;background:var(--bg-soft);border-radius:20px;overflow:hidden;border:1px solid var(--border)}
.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--brand-2),var(--brand),var(--ok));transition:width .25s}

/* Alerts */
.alert{padding:13px 17px;border-radius:12px;margin-bottom:20px;font-size:14px;font-weight:500}
.alert.info{background:rgba(76,158,255,.1);border:1px solid color-mix(in srgb,var(--brand) 45%,transparent);color:#bcd9ff}
.alert.error{background:rgba(244,86,110,.1);border:1px solid color-mix(in srgb,var(--danger) 45%,transparent);color:#ffaeba}

/* ---------- Login ---------- */
.login-lang{position:fixed;top:18px;right:18px;display:inline-flex;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:3px;z-index:5}
.login-lang a{padding:6px 12px;border-radius:8px;font-size:12.5px;font-weight:700;color:var(--muted)}
.login-lang a.active{background:var(--panel-3);color:#fff}
.login-wrap{min-height:100dvh;display:grid;place-items:center;padding:24px}
.login-card{background:var(--panel);border:1px solid var(--border);border-radius:20px;padding:42px 36px;width:100%;max-width:392px;text-align:center;box-shadow:var(--shadow)}
.login-logo{font-size:56px;margin-bottom:6px}
.login-card h1{font-size:23px}
.login-card form{display:flex;flex-direction:column;gap:14px;margin-top:20px}

/* ---------- Mobile ---------- */
@media (max-width:820px){
  .hamburger{display:block}
  .nav{
    position:fixed;top:0;right:0;height:100dvh;width:min(300px,84vw);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:8px;
    background:var(--bg-soft);border-left:1px solid var(--border);
    padding:84px 18px 24px;transform:translateX(105%);transition:transform .26s ease;z-index:55;overflow-y:auto;
    box-shadow:-20px 0 50px -20px rgba(0,0,0,.7);
  }
  .nav.open{transform:translateX(0)}
  .navlink{padding:13px 16px;font-size:15.5px}
  .lang-switch{margin:6px 0;justify-content:center}
  .lang-switch a{flex:1;text-align:center;padding:9px}
  .logout-form{margin-top:6px}
  .btn-logout{width:100%;padding:12px}
  .nav-backdrop{display:block;position:fixed;inset:0;background:rgba(5,7,12,.6);opacity:0;visibility:hidden;transition:.26s;z-index:54}
  .nav-backdrop.show{opacity:1;visibility:visible}
  .cols{grid-template-columns:1fr}
  .page-head{flex-direction:column;align-items:stretch}
  .page-head .btn-primary{width:100%}
  .head-actions{width:100%}
  .head-actions .btn-primary,.head-actions form,.head-actions .btn-danger{width:100%}
}
@media (max-width:480px){
  .container{padding:22px 15px 80px}
  .topbar-inner{padding:0 15px}
  .brand-text{font-size:16px}
  .grid{grid-template-columns:1fr 1fr;gap:13px}
  .topic-thumb{height:96px}
  .topic-thumb-ic{font-size:34px}
  .card-body{padding:13px}
  .media-grid{grid-template-columns:1fr;gap:14px}
  .panel{padding:18px}
  .login-card{padding:34px 24px}
  .stats{gap:9px}
  .stat{flex-direction:column;align-items:flex-start;gap:8px;padding:13px}
  .stat-ic{width:38px;height:38px;font-size:19px}
  .stat b{font-size:17px}
  .stat small{font-size:11px}
  .toolbar select{flex:1}
}
@media (max-width:340px){
  .grid{grid-template-columns:1fr}
}