:root {
    --bg: #f3f4f1;
    --kart: #ffffff;
    --yazi: #1d2321;
    --soluk: #6b736f;
    --cizgi: #e1e4df;
    --ana: #1f6f5c;
    --ana-koyu: #17574a;
    --ana-acik: #e3f0ec;
    --hata: #b3261e;
    --hata-acik: #fbe9e7;
    --pasif: #9a6b00;
    --eski: #6b736f;
    --golge: 0 1px 2px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.05);
    --r: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg); color: var(--yazi); font-size: 16px; line-height: 1.4;
    -webkit-tap-highlight-color: transparent;
}
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

/* ---------- Üst bar ---------- */
.ust {
    position: sticky; top: 0; z-index: 20;
    display: flex; align-items: center; gap: 8px;
    height: 56px; padding: 0 8px;
    background: var(--ana); color: #fff;
}
.ust h1 { flex: 1; margin: 0; font-size: 18px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ikon-btn {
    width: 44px; height: 44px; border: 0; border-radius: 10px; background: transparent;
    color: #fff; font-size: 26px; line-height: 44px; text-align: center; cursor: pointer;
}
.ikon-btn:hover { background: rgba(255,255,255,.12); }
.ikon-bos { width: 44px; }
.menu { position: relative; }
.menu-icerik {
    position: absolute; right: 0; top: 50px; min-width: 210px;
    background: var(--kart); color: var(--yazi); border-radius: var(--r);
    box-shadow: 0 8px 28px rgba(0,0,0,.18); padding: 6px; display: flex; flex-direction: column;
}
.menu-icerik a { padding: 12px 14px; border-radius: 8px; }
.menu-icerik a:hover { background: var(--ana-acik); }
.menu-icerik hr { border: 0; border-top: 1px solid var(--cizgi); margin: 4px 0; }
.menu-icerik .cikis { color: var(--hata); }

.icerik { max-width: 720px; margin: 0 auto; padding: 16px 16px 96px; }
.karsilama { color: var(--soluk); margin: 4px 0 14px; }
.bos { color: var(--soluk); text-align: center; padding: 24px 8px; list-style: none; }
.bos-kucuk { color: rgba(255,255,255,.75); font-size: 14px; }
.flash { background: var(--ana-acik); color: var(--ana-koyu); padding: 12px 14px; border-radius: var(--r); margin-bottom: 12px; }
.hata { background: var(--hata-acik); color: var(--hata); padding: 12px 14px; border-radius: var(--r); margin-bottom: 12px; }

/* ---------- Butonlar ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 44px; padding: 0 16px; border: 1px solid var(--cizgi); border-radius: 10px;
    background: var(--kart); color: var(--yazi); font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { border-color: var(--ana); }
.btn-ana { background: var(--ana); border-color: var(--ana); color: #fff; }
.btn-ana:hover { background: var(--ana-koyu); }
.btn:disabled { opacity: .6; cursor: default; }
.genis { width: 100%; }

input[type=text], input[type=email], input[type=password], input[type=number],
input[type=datetime-local], select {
    width: 100%; min-height: 44px; padding: 8px 10px; font: inherit; color: var(--yazi);
    border: 1px solid var(--cizgi); border-radius: 10px; background: #fff;
}
input:focus, select:focus { outline: 2px solid var(--ana); outline-offset: -1px; border-color: var(--ana); }
label { display: block; font-size: 14px; color: var(--soluk); }
label > input, label > select { margin-top: 4px; }

/* ---------- Giriş ---------- */
.login-body { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-kart {
    width: 100%; max-width: 360px; background: var(--kart); border-radius: 16px;
    box-shadow: var(--golge); padding: 28px 22px; display: grid; gap: 14px;
}
.login-kart h1 { margin: 0; font-size: 22px; color: var(--ana); }
.alt-yazi { margin: -8px 0 4px; color: var(--soluk); }

/* ---------- Sınıflar ---------- */
.sinif-liste { display: grid; gap: 10px; }
.sinif-btn {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 18px; background: var(--kart); border-radius: var(--r);
    box-shadow: var(--golge); border-left: 5px solid var(--ana);
}
.sinif-btn:active { transform: scale(.99); }
.sinif-ad { font-size: 20px; font-weight: 700; }
.sinif-sayi { color: var(--soluk); font-size: 14px; }

/* ---------- Panel ---------- */
.panel {
    background: var(--ana); color: #fff; border-radius: var(--r);
    padding: 14px 14px 12px; margin-bottom: 12px;
}
.panel-baslik { margin: 0 0 10px; font-size: 22px; }
.panel-baslik small { font-size: 14px; font-weight: 500; opacity: .8; margin-left: 6px; }
.gorev-serit {
    display: flex; gap: 8px; overflow-x: auto; scroll-snap-type: x proximity;
    padding-bottom: 4px; scrollbar-width: thin;
}
.gorev-cip {
    flex: 0 0 auto; scroll-snap-align: start;
    padding: 10px 16px; border-radius: 999px; background: rgba(255,255,255,.16);
    border: 1px solid rgba(255,255,255,.3); font-weight: 600; white-space: nowrap;
}
.gorev-cip:hover { background: rgba(255,255,255,.26); }
.panel label { color: rgba(255,255,255,.85); }
.d-ust-form { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 480px) { .d-ust-form { grid-template-columns: 1fr; } }

/* ---------- Öğrenci listesi ---------- */
.ogr-liste { list-style: none; margin: 0; padding: 0; background: var(--kart); border-radius: var(--r); box-shadow: var(--golge); overflow: hidden; }
.ogr-liste > li { border-bottom: 1px solid var(--cizgi); }
.ogr-liste > li:last-child { border-bottom: 0; }
.ogr { display: flex; align-items: center; gap: 12px; padding: 14px; cursor: pointer; }
.ogr:hover { background: #fafbf9; }
.ogr-no { min-width: 44px; color: var(--soluk); font-variant-numeric: tabular-nums; font-size: 14px; }
.ogr-ad { flex: 1; font-weight: 500; }
.ogr-gizli { background: #fafaf8; }
.ogr-gizli .ogr-ad { color: var(--soluk); }
.gizli-satir { padding: 12px 14px; text-align: center; color: var(--ana); font-weight: 600; cursor: pointer; background: var(--ana-acik); }
.gizli-satir .ok { display: inline-block; transition: transform .2s; }
.gizli-satir.acik .ok { transform: rotate(180deg); }
.rozet { font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; margin-left: 6px; vertical-align: middle; }
.rozet-pasif { background: #fff3d6; color: var(--pasif); }
.rozet-eski { background: #eceeec; color: var(--eski); }

/* ---------- Değerleme ---------- */
.d-toplu {
    display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
    background: var(--kart); border-radius: var(--r); box-shadow: var(--golge);
    padding: 10px 12px; margin-bottom: 8px;
    position: sticky; top: 60px; z-index: 10;
}
.d-tumu { display: flex; align-items: center; gap: 8px; color: var(--yazi); font-size: 15px; font-weight: 600; margin-right: auto; }
.d-toplu select { width: auto; flex: 1 1 140px; }
.d-satir { display: flex; align-items: center; gap: 10px; padding: 8px 12px; }
.d-sol { flex: 1; display: flex; align-items: center; gap: 10px; color: var(--yazi); font-size: 16px; cursor: pointer; min-width: 0; }
.d-sol .ogr-ad { overflow: hidden; text-overflow: ellipsis; }
.d-satir .sec-sel { width: 150px; flex: 0 0 auto; }
.d-satir.isaretli { background: var(--ana-acik); }
.d-satir .sec-sel.dolu { border-color: var(--ana); background: #f4faf8; }
input[type=checkbox] { width: 22px; height: 22px; accent-color: var(--ana); flex: 0 0 auto; }
.alt-bar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 15;
    display: flex; justify-content: flex-end; align-items: center; gap: 12px;
    padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255,255,255,.95); border-top: 1px solid var(--cizgi);
}
.alt-bar .btn { min-width: 140px; }
.sayac { color: var(--soluk); font-size: 14px; margin-right: auto; max-width: 720px; }

/* ---------- Modal ---------- */
.modal-arka {
    position: fixed; inset: 0; z-index: 50; background: rgba(20,26,24,.45);
    display: flex; align-items: flex-end; justify-content: center;
}
@media (min-width: 600px) { .modal-arka { align-items: center; } }
.modal {
    position: relative; width: 100%; max-width: 560px;
    height: 80vh; height: 80dvh; overflow-y: auto; overscroll-behavior: contain;
    background: var(--kart); border-radius: 16px 16px 0 0; padding: 20px 18px 24px;
}
@media (min-width: 600px) { .modal { border-radius: 16px; } }
.modal-kapat { position: absolute; right: 8px; top: 8px; width: 40px; height: 40px; border: 0; background: transparent; font-size: 28px; color: var(--soluk); cursor: pointer; }
.modal-ust { position: relative; padding-right: 96px; margin-bottom: 14px; }
.m-ayar-btn {
    position: absolute; right: 44px; top: -12px; width: 40px; height: 40px; border: 0; border-radius: 10px;
    background: transparent; font-size: 24px; color: var(--soluk); cursor: pointer; transition: transform .25s, color .2s;
}
.m-ayar-btn:hover { color: var(--ana); }
.m-ayar-btn[aria-expanded="true"] { color: var(--ana); transform: rotate(60deg); }
.m-no { color: var(--soluk); font-size: 14px; }
.m-ad { font-size: 22px; font-weight: 700; }
.m-form { display: grid; grid-template-columns: 1fr 100px auto; gap: 10px; align-items: end; padding: 12px; background: var(--bg); border-radius: var(--r); }
/* Akordiyon: varsayılan kapalı */
.m-akordiyon { overflow: hidden; max-height: 0; padding-top: 0; padding-bottom: 0; opacity: 0;
    transition: max-height .3s ease, padding .3s ease, opacity .2s ease; }
.m-akordiyon.acik { max-height: 260px; padding-top: 12px; padding-bottom: 12px; opacity: 1; }
@media (max-width: 400px) { .m-form { grid-template-columns: 1fr 1fr; } .m-form .btn { grid-column: span 2; } }
.m-alt-baslik { font-size: 16px; margin: 18px 0 8px; }
.karne table { width: 100%; border-collapse: collapse; font-size: 14px; }
.karne th, .karne td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--cizgi); }
.karne th { color: var(--soluk); font-weight: 600; }
.karne td.puan { text-align: right; font-variant-numeric: tabular-nums; }
.karne .bos { padding: 12px; }