/* ==========================================================
   Kadir Hoca – Yönetim Paneli (modern & responsive)
   ========================================================== */
:root{
    --primary:#6366f1; --primary-dark:#4f46e5; --purple:#8b5cf6;
    --green:#10b981; --orange:#f59e0b; --red:#ef4444; --blue:#3b82f6;
    --ink:#0f172a; --ink-2:#1e293b; --muted:#64748b; --muted-2:#94a3b8;
    --line:#e5e7eb; --bg:#f4f6fb; --card:#ffffff;
    --sb:#0f172a; --sb-2:#1e293b; --sb-line:rgba(255,255,255,.08);
    --radius:16px; --radius-sm:10px;
    --shadow:0 1px 3px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.05);
    --sidebar-w:264px; --topbar-h:64px;
    --font:'Inter',system-ui,sans-serif; --head:'Space Grotesk',var(--font);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}
a{text-decoration:none}

/* ---- Shell ---- */
.admin-shell{display:flex;min-height:100vh}

/* ---- Sidebar ---- */
.admin-sidebar{
    width:var(--sidebar-w);flex-shrink:0;background:var(--sb);color:#cbd5e1;
    position:fixed;top:0;left:0;height:100vh;display:flex;flex-direction:column;
    z-index:1040;transition:transform .3s cubic-bezier(.4,0,.2,1)
}
.as-brand{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--sb-line)}
.as-logo{width:40px;height:40px;border-radius:11px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
    font-size:1.35rem;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),var(--purple))}
.as-brand-text strong{display:block;color:#fff;font-family:var(--head);font-size:1.02rem;line-height:1.1}
.as-brand-text small{color:var(--muted-2);font-size:.72rem}
.as-close{margin-left:auto;background:none;border:none;color:#94a3b8;font-size:1.1rem;cursor:pointer}
.as-nav{flex:1;overflow-y:auto;padding:14px 12px}
.as-link{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;color:#cbd5e1;
    font-size:.9rem;font-weight:500;margin-bottom:3px;transition:all .18s}
.as-link i{font-size:1.1rem;width:22px;text-align:center;flex-shrink:0}
.as-link:hover{background:rgba(255,255,255,.06);color:#fff}
.as-link.active{background:linear-gradient(135deg,var(--primary),var(--purple));color:#fff;
    box-shadow:0 6px 18px rgba(99,102,241,.35)}
.as-divider{height:1px;background:var(--sb-line);margin:12px 6px}
.as-link.as-danger{color:#fca5a5}
.as-link.as-danger:hover{background:rgba(239,68,68,.15);color:#fecaca}
.as-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(2px);z-index:1035}

/* ---- Main ---- */
.admin-main{flex:1;margin-left:var(--sidebar-w);min-width:0;display:flex;flex-direction:column}
.admin-topbar{position:sticky;top:0;z-index:1020;height:var(--topbar-h);background:rgba(255,255,255,.85);
    backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 22px}
.tb-burger{background:none;border:none;font-size:1.5rem;color:var(--ink);cursor:pointer;line-height:1}
.tb-title{font-family:var(--head);font-size:1.25rem;font-weight:700;color:var(--ink)}
.tb-right{margin-left:auto;display:flex;align-items:center;gap:16px}
.tb-date{font-size:.85rem;color:var(--muted);font-weight:500}
.tb-user{display:flex;align-items:center;gap:9px;font-size:.9rem;font-weight:600}
.tb-avatar{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--purple));
    color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;text-transform:uppercase}
.admin-content{padding:24px 22px 40px;max-width:1400px;width:100%}

/* ---- Stat cards ---- */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px;margin-bottom:22px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;
    box-shadow:var(--shadow);display:flex;align-items:center;gap:14px}
.stat-ic{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.stat-ic.i1{background:rgba(99,102,241,.1);color:var(--primary)}
.stat-ic.i2{background:rgba(16,185,129,.1);color:var(--green)}
.stat-ic.i3{background:rgba(59,130,246,.1);color:var(--blue)}
.stat-ic.i4{background:rgba(245,158,11,.1);color:var(--orange)}
.stat-ic.i5{background:rgba(139,92,246,.1);color:var(--purple)}
.stat-info b{display:block;font-family:var(--head);font-size:1.7rem;font-weight:700;line-height:1.1;color:var(--ink)}
.stat-info span{font-size:.8rem;color:var(--muted);font-weight:500}

/* ---- Card ---- */
.card2{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px}
.card2-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:16px 20px;border-bottom:1px solid var(--line)}
.card2-head h2{font-family:var(--head);font-size:1.02rem;font-weight:700;color:var(--ink);display:flex;align-items:center;gap:8px}
.card2-head h2 i{color:var(--primary)}
.card2-body{padding:20px}
.card2-body.p0{padding:0}

/* ---- Grid helpers ---- */
.row-2{display:grid;grid-template-columns:1.4fr 1fr;gap:20px}
.row-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:991px){.row-2,.row-3{grid-template-columns:1fr}}

/* ---- Table ---- */
.tbl-wrap{overflow-x:auto}
table.tbl{width:100%;border-collapse:collapse;font-size:.88rem}
table.tbl th{text-align:left;padding:12px 16px;background:#f8fafc;color:var(--muted);font-weight:600;
    font-size:.76rem;text-transform:uppercase;letter-spacing:.4px;white-space:nowrap;border-bottom:1px solid var(--line)}
table.tbl td{padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:middle;color:var(--ink)}
table.tbl tr:last-child td{border-bottom:none}
table.tbl tbody tr:hover{background:#f8faff}
.t-name{font-weight:600}
.t-sub{font-size:.78rem;color:var(--muted)}

/* ---- Badges ---- */
.badge2{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:.72rem;font-weight:700}
.b-green{background:rgba(16,185,129,.12);color:var(--green)}
.b-red{background:rgba(239,68,68,.12);color:var(--red)}
.b-orange{background:rgba(245,158,11,.14);color:#b45309}
.b-blue{background:rgba(59,130,246,.12);color:var(--blue)}
.b-purple{background:rgba(139,92,246,.12);color:var(--purple)}
.b-gray{background:#f1f5f9;color:var(--muted)}
.pill{display:inline-block;padding:2px 9px;border-radius:6px;font-size:.72rem;font-weight:700;background:rgba(99,102,241,.1);color:var(--primary)}

/* ---- Buttons ---- */
.btn2{display:inline-flex;align-items:center;gap:7px;padding:9px 16px;border-radius:10px;font-weight:600;font-size:.86rem;
    border:1px solid transparent;cursor:pointer;transition:all .2s;line-height:1}
.btn2-primary{background:linear-gradient(135deg,var(--primary),var(--purple));color:#fff}
.btn2-primary:hover{box-shadow:0 6px 18px rgba(99,102,241,.35);transform:translateY(-1px);color:#fff}
.btn2-light{background:#fff;border-color:var(--line);color:var(--ink)}
.btn2-light:hover{border-color:var(--primary);color:var(--primary)}
.btn2-green{background:var(--green);color:#fff}
.btn2-green:hover{filter:brightness(.95);color:#fff}
.btn2-sm{padding:6px 11px;font-size:.8rem;border-radius:8px}
.icon-btn{width:34px;height:34px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;
    border:1px solid var(--line);background:#fff;color:var(--muted);cursor:pointer;transition:all .18s;font-size:.9rem}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.icon-btn.del:hover{border-color:var(--red);color:var(--red)}

/* ---- Forms ---- */
.form-label2{font-size:.82rem;font-weight:600;color:var(--ink);margin-bottom:5px;display:block}
.inp{width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:10px;font-size:.9rem;font-family:inherit;background:#fff;color:var(--ink)}
.inp:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.12)}
textarea.inp{resize:vertical;min-height:90px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.mb-3b{margin-bottom:14px}

/* ---- Lists (son kayıtlar vb.) ---- */
.mini-list{display:flex;flex-direction:column}
.mini-item{display:flex;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line)}
.mini-item:last-child{border-bottom:none}
.mini-ava{width:38px;height:38px;border-radius:11px;background:rgba(99,102,241,.1);color:var(--primary);
    display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0;text-transform:uppercase}
.mini-item .mi-main{flex:1;min-width:0}
.mini-item .mi-main b{display:block;font-size:.86rem;font-weight:600}
.mini-item .mi-main small{color:var(--muted);font-size:.76rem}
.mini-item .mi-time{font-size:.74rem;color:var(--muted-2);white-space:nowrap}

/* ---- Empty ---- */
.empty{text-align:center;padding:50px 20px;color:var(--muted)}
.empty i{font-size:2.4rem;color:var(--muted-2);display:block;margin-bottom:10px}

/* ---- Filter bar ---- */
.filterbar{display:flex;flex-wrap:wrap;gap:10px;align-items:end}
.filterbar .fb-field{flex:1;min-width:150px}

/* ---- Login ---- */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
    background:linear-gradient(135deg,#1e1b4b,#0f172a)}
.login-card{background:#fff;border-radius:20px;padding:36px 32px;width:100%;max-width:400px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.login-logo{width:56px;height:56px;border-radius:15px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;
    font-size:1.8rem;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),var(--purple))}
.login-card h1{font-family:var(--head);text-align:center;font-size:1.35rem;margin-bottom:4px}
.login-card p{text-align:center;color:var(--muted);font-size:.88rem;margin-bottom:24px}

/* ---- Responsive ---- */
@media(max-width:991px){
    .admin-sidebar{transform:translateX(-100%)}
    .admin-sidebar.open{transform:translateX(0)}
    .admin-main{margin-left:0}
    .as-overlay.open{display:block}
    .admin-content{padding:18px 15px 34px}
}
@media(max-width:575px){
    .stat-info b{font-size:1.4rem}
    .tb-title{font-size:1.05rem}
    .card2-head{flex-wrap:wrap}
}

/* ==================== ÖĞRENCİ PANELİ EK ==================== */
/* Video oynatıcı */
.player-wrap{background:#000;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-bottom:16px}
.player-box{position:relative;width:100%;aspect-ratio:16/9;background:#0b1020}
.player-box iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.player-empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#64748b;gap:10px}
.player-empty i{font-size:2.6rem}
.player-title{padding:14px 18px;background:#fff;border:1px solid var(--line);border-top:none;border-radius:0 0 var(--radius) var(--radius);font-family:var(--head);font-weight:700}

/* Ders/konu akordeonu */
.lesson{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden;background:#fff}
.lesson-head{display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;user-select:none}
.lesson-head:hover{background:#f8faff}
.lesson-head .l-ic{width:38px;height:38px;border-radius:10px;background:rgba(99,102,241,.1);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.lesson-head .l-main{flex:1;min-width:0}
.lesson-head .l-main b{display:block;font-size:.92rem}
.lesson-head .l-main small{color:var(--muted);font-size:.76rem}
.lesson-head .chev{transition:transform .2s;color:var(--muted)}
.lesson.open .chev{transform:rotate(90deg)}
.lesson-body{display:none;border-top:1px solid var(--line)}
.lesson.open .lesson-body{display:block}
.vid-row{display:flex;align-items:center;gap:12px;padding:11px 16px 11px 20px;border-bottom:1px solid var(--line);cursor:pointer;transition:background .15s}
.vid-row:last-child{border-bottom:none}
.vid-row:hover{background:#f8faff}
.vid-row.active{background:rgba(99,102,241,.08)}
.vid-row i{color:var(--primary)}
.vid-row .v-title{flex:1;font-size:.88rem}
.vid-row .v-dur{font-size:.76rem;color:var(--muted)}

/* Kurs kutuları (dashboard) */
.course-card{display:flex;align-items:center;gap:14px;padding:16px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:12px;transition:all .2s;text-decoration:none;color:inherit}
.course-card:hover{border-color:rgba(99,102,241,.25);box-shadow:var(--shadow);transform:translateX(3px);color:inherit}
.course-card .cc-ic{width:52px;height:52px;border-radius:13px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:1.4rem;background:linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.12));color:var(--primary)}
.course-card .cc-main{flex:1;min-width:0}
.course-card .cc-main b{display:block;font-size:.98rem;font-family:var(--head)}
.course-card .cc-go{color:var(--primary);font-weight:600;font-size:.85rem;white-space:nowrap}

/* Welcome banner */
.welcome{background:linear-gradient(135deg,var(--primary),var(--purple));color:#fff;border-radius:var(--radius);padding:26px;margin-bottom:22px;position:relative;overflow:hidden}
.welcome h2{font-family:var(--head);font-weight:800;font-size:1.5rem;margin-bottom:4px}
.welcome p{opacity:.85;margin:0;font-size:.92rem}
.welcome .w-ic{position:absolute;right:-10px;bottom:-20px;font-size:8rem;opacity:.12}