:root{
    --bg-0:#0B0F14;
    --bg-1:#121820;
    --bg-2:#182029;
    --bg-panel:#141B24;
    --border:#25313D;
    --border-soft:#1D2733;
    --ink-1:#E9ECEF;
    --ink-2:#9AA7B4;
    --ink-3:#5C6B79;
    --gold:#D8A84E;
    --gold-dim:#8C6E37;
    --ok:#43C98E;
    --ok-bg:rgba(67,201,142,.12);
    --bad:#EF6A6A;
    --bad-bg:rgba(239,106,106,.12);
    --radius:14px;
    --font-display:'Space Grotesk',sans-serif;
    --font-body:'Inter',sans-serif;
    --font-mono:'JetBrains Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{
    background:
        radial-gradient(circle at 15% 0%, rgba(216,168,78,.06), transparent 45%),
        radial-gradient(circle at 85% 100%, rgba(67,150,201,.05), transparent 40%),
        var(--bg-0);

    color:var(--ink-1);

    font-family:var(--font-body);

    min-height:100vh;

    overflow-x:hidden;
}
#app{
    display:flex;
    flex-direction:column;
    min-height:100vh;
    width:100%;
}

/* ---------- HEADER ---------- */
.motor-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:14px 26px;
    background:rgba(18,24,32,.85);
    border-bottom:1px solid var(--border);
    backdrop-filter:blur(10px);
    position:sticky;
    top:0;
    z-index:50;
    flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0;}
.brand img{height:34px;width:34px;object-fit:contain;border-radius:8px;background:var(--bg-2);padding:4px;}
.brand-text h1{font-family:var(--font-display);font-size:15px;font-weight:600;letter-spacing:.2px;}
.brand-text span{font-size:11.5px;color:var(--ink-3);font-family:var(--font-mono);letter-spacing:.5px;}

.progress-track{flex:1;display:flex;align-items:center;gap:8px;min-width:220px;max-width:480px;}
.dot{flex:1;height:6px;border-radius:4px;background:var(--border);cursor:pointer;border:none;transition:.25s;padding:0;}
.dot.done{background:var(--gold);}
.dot.active{background:var(--ink-1);}

.sinav-toggle-wrap{display:flex;align-items:center;gap:10px;}
.switch{width:52px;height:28px;border-radius:20px;background:var(--bg-2);border:1px solid var(--border);position:relative;cursor:pointer;transition:.25s;padding:0;}
.switch::after{content:'';position:absolute;width:20px;height:20px;border-radius:50%;background:var(--ink-3);top:3px;left:3px;transition:.25s;}
.switch.on{background:rgba(216,168,78,.18);border-color:var(--gold-dim);}
.switch.on::after{background:var(--gold);transform:translateX(24px);}
.durum-badge{font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:1px;padding:5px 10px;border-radius:20px;border:1px solid var(--border);color:var(--ink-3);}
.durum-badge.aktif{color:var(--gold);border-color:var(--gold-dim);background:rgba(216,168,78,.08);}

/* ---------- STAGE ---------- */
.stage{flex:1;padding:28px;max-width:1440px;width:100%;margin:0 auto;}
.ders-slide{display:none;}
.ders-slide.active{display:grid;grid-template-columns:1.15fr 1fr;gap:22px;align-items:start;animation:fadeIn .35s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;}
.panel + .panel{margin-top:18px;}

.eyebrow{font-family:var(--font-mono);font-size:11px;letter-spacing:1.5px;color:var(--gold);text-transform:uppercase;display:flex;align-items:center;gap:8px;margin-bottom:10px;}
.eyebrow::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--gold);}

.ders-baslik{font-family:var(--font-display);font-size:24px;font-weight:700;margin-bottom:8px;letter-spacing:.2px;}
.ders-anlatimi{color:var(--ink-2);font-size:14.5px;line-height:1.7;margin-bottom:18px;}

.hikaye-kutu{background:var(--bg-1);border:1px solid var(--border-soft);border-left:3px solid var(--gold-dim);border-radius:10px;padding:16px 18px;font-size:14.5px;line-height:1.75;color:var(--ink-1);white-space:pre-line;}

.grafik-alan{margin:18px 0 6px;}
.grafik-alan svg{width:100%;height:110px;display:block;}
.grafik-etiket{font-family:var(--font-mono);font-size:10.5px;color:var(--ink-3);letter-spacing:.5px;margin-top:4px;text-transform:uppercase;}

.gorsel-alan{margin:16px 0;border-radius:10px;overflow:hidden;border:1px solid var(--border-soft);}
.gorsel-alan img{
    width:100%;
    display:block;
    object-fit:cover;
}

.sifre-kutu{background:linear-gradient(135deg,#0F1720,#0B0F14);border:1px solid var(--gold-dim);border-radius:10px;padding:16px 18px;position:relative;overflow:hidden;}
.sifre-kutu::before{content:'ŞİFRE';position:absolute;top:10px;right:14px;font-family:var(--font-mono);font-size:10px;letter-spacing:2px;color:var(--gold-dim);}
.sifre-metin{
    font-family:var(--font-mono);
    font-weight:700;
    font-size:15px;
    color:var(--gold);
    letter-spacing:.5px;
    line-height:1.6;
    word-break:break-word;
    white-space:pre-line;
}

.kilit-buton{margin-top:18px;width:100%;padding:13px 18px;border-radius:10px;border:1px solid var(--gold-dim);background:rgba(216,168,78,.1);color:var(--gold);font-family:var(--font-display);font-weight:600;font-size:14px;cursor:pointer;transition:.2s;}
.kilit-buton:hover{background:rgba(216,168,78,.18);}
.kilit-buton:disabled{cursor:default;opacity:.75;}

/* ---------- SORU PANELİ ---------- */
.soru-panel{position:sticky;top:88px;}
.soru-panel-inner{position:relative;}
.soru-ust{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;}
.soru-no{font-family:var(--font-mono);font-size:12px;color:var(--ink-3);letter-spacing:1px;}
.kilit-durum{font-family:var(--font-mono);font-size:10.5px;padding:4px 9px;border-radius:20px;border:1px solid var(--border);color:var(--ink-3);}
.kilit-durum.acik{color:var(--ok);border-color:rgba(67,201,142,.35);background:var(--ok-bg);}

.soru-metin{font-family:var(--font-display);font-size:18px;font-weight:600;line-height:1.5;margin-bottom:20px;}

.siklar-liste{display:flex;flex-direction:column;gap:10px;}
.sik{display:flex;align-items:center;gap:12px;padding:14px 16px;border-radius:10px;border:1px solid var(--border);background:var(--bg-1);cursor:pointer;transition:.18s;font-size:14px;color:var(--ink-1);width:100%;text-align:left;font-family:var(--font-body);}
.sik:hover:not(.disabled){
    border-color:var(--gold-dim);
    transform:translateX(2px);
    box-shadow:0 0 18px rgba(216,168,78,.12);
}.sik.disabled{cursor:not-allowed;opacity:.5;}
.sik .harf{font-family:var(--font-mono);font-weight:700;font-size:12.5px;width:26px;height:26px;border-radius:7px;background:var(--bg-2);display:flex;align-items:center;justify-content:center;color:var(--ink-2);flex-shrink:0;}
.sik.dogru{background:var(--ok-bg);border-color:var(--ok);}
.sik.dogru .harf{background:var(--ok);color:#08221A;}
.sik.yanlis{background:var(--bad-bg);border-color:var(--bad);}
.sik.yanlis .harf{background:var(--bad);color:#2A0A0A;}

.geri-bildirim{margin-top:16px;padding:12px 14px;border-radius:10px;font-size:13.5px;display:none;line-height:1.5;}
.geri-bildirim.goster{display:block;}
.geri-bildirim.ok{background:var(--ok-bg);color:var(--ok);border:1px solid rgba(67,201,142,.35);}
.geri-bildirim.bad{background:var(--bad-bg);color:var(--bad);border:1px solid rgba(239,106,106,.35);}

.sonraki-buton{margin-top:16px;width:100%;padding:13px;border-radius:10px;border:none;background:var(--gold);color:#1A1305;font-family:var(--font-display);font-weight:700;font-size:14px;cursor:pointer;display:none;}
.sonraki-buton.goster{display:block;}

.overlay-kilitli{position:absolute;inset:0;background:rgba(11,15,20,.72);backdrop-filter:blur(2px);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;text-align:center;padding:20px;}
.overlay-kilitli span{font-family:var(--font-mono);font-size:11px;color:var(--ink-2);letter-spacing:.5px;}

.bos-durum{max-width:640px;margin:60px auto;text-align:center;padding:40px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius);}
.bos-durum h2{font-family:var(--font-display);margin-bottom:10px;}
.bos-durum p{color:var(--ink-2);font-size:14px;line-height:1.6;}

.footer-not{width:100%;max-width:1440px;margin:0 auto;padding:0 28px 26px;text-align:center;font-size:12px;color:var(--ink-3);letter-spacing:.3px;}

@media (max-width:900px){
    .ders-slide.active{grid-template-columns:1fr;}
    .soru-panel{position:static;}
    .progress-track{order:3;max-width:100%;}
}
img{
    max-width:100%;
}

svg{
    max-width:100%;
}