:root{
  --bg:#0b1220; --surface:#111827; --muted:#1f2937; --text:#e5e7eb; --soft:#9ca3af;
  --ok:#10b981; --blue:#3b82f6; --red:#ef4444; --amber:#f59e0b;
  --radius:1.25rem;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:linear-gradient(180deg,#0b1220,#0b1220 50%,#0e1726);
  color:var(--text);font-family:system-ui, -apple-system, Segoe UI, Roboto, Noto Kufi Arabic, "Noto Naskh Arabic", Arial, sans-serif}
.app-header{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;
  background:rgba(17,24,39,.7);backdrop-filter:blur(8px);padding:12px 16px;border-bottom:1px solid #1f2937}
h1{margin:0;font-size:1.4rem}
.ghost{background:transparent;border:1px solid var(--muted);padding:.4rem .7rem;border-radius:.75rem;color:var(--text);cursor:pointer}
.small{font-size:.9rem}
main{height:calc(100vh - 56px)}
.screen{display:none;height:100%;padding:14px}
.screen.active{display:block}
.fab{position:fixed;right:16px;bottom:16px;width:56px;height:56px;border-radius:50%;
  border:none;background:linear-gradient(135deg,#22c55e,#16a34a);box-shadow:0 10px 20px rgba(0,0,0,.4);
  color:white;font-size:28px;cursor:pointer}
.list{display:flex;flex-direction:column;gap:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}

.card{background:var(--surface);border:1px solid var(--muted);border-radius:var(--radius);padding:12px;position:relative}
.chip{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:1rem;color:#0b1220;font-weight:700}
.subject-row{display:flex;align-items:center;justify-content:space-between;padding:14px;border-radius:var(--radius);color:#0b1220;font-weight:700}
.subject-left{display:flex;align-items:center;gap:10px}
.icon{width:36px;height:36px;border-radius:12px;background:rgba(255,255,255,.2);display:grid;place-items:center;font-size:20px}

.topbar{display:flex;align-items:center;gap:10px}
.topbar .title-wrap{display:flex;align-items:center;gap:10px}
.back{border:none;background:var(--muted);color:var(--text);border-radius:999px;padding:8px 12px;cursor:pointer}

.tabs{display:flex;gap:8px;margin:12px 0}
.tab{flex:1;border:none;background:var(--muted);color:var(--text);padding:10px;border-radius:999px;cursor:pointer;opacity:.8}
.tab.active{opacity:1;outline:2px solid var(--text);background:var(--muted);}
.tab-content{position:relative;min-height:50vh}
.tab-content.hidden{display:none}

.notes-item{background:var(--surface);border:1px solid var(--muted);border-radius:var(--radius);padding:10px;cursor:pointer}
.note-title{font-weight:700}
.note-body{opacity:.85;margin-top:6px}

.pdf-row,.audio-row{display:flex;align-items:center;justify-content:space-between;gap:8px;
  background:var(--surface);border:1px solid var(--muted);padding:12px;border-radius:var(--radius)}
.row-title{font-weight:700}
.row-actions{display:flex;align-items:center;gap:8px}
button.smallx{border:none;background:var(--muted);color:var(--text);padding:6px 10px;border-radius:10px;cursor:pointer}

.photo-group{padding:10px;border-radius:var(--radius);border:1px dashed var(--muted)}
.photo-group-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.photos-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}
.photo-tile{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--muted);cursor:pointer}
.photo-tile img{width:100%;height:100%;object-fit:cover;display:block}
.photo-full{position:fixed;inset:0;background:rgba(0,0,0,.9);display:none;align-items:center;justify-content:center;z-index:50}
.photo-full img{max-width:95vw;max-height:90vh;border-radius:16px;border:1px solid #333}

dialog{border:none;border-radius:16px;max-width:min(520px,92vw);width:100%;background:#0f172a;color:var(--text)}
dialog::backdrop{background:rgba(0,0,0,.6)}
dialog form{display:flex;flex-direction:column;gap:10px}
label{display:flex;flex-direction:column;gap:6px}
input,textarea{background:#0b1220;color:var(--text);border:1px solid var(--muted);border-radius:10px;padding:10px}
.icons8,.levels{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.icons8 button,.levels button{border:1px solid var(--muted);background:#0b1220;color:var(--text);padding:10px;border-radius:10px;cursor:pointer}
.icons8 button.active,.levels button.active{outline:2px solid var(--ok)}

footer{padding:20px 0;color:var(--soft);text-align:center}