:root {
    --yesil: #186B2E;
    --yesil-acik: #2EA043;
    --yesil-bg: #E7F5EA;
    --kirmizi: #B42318;
    --kirmizi-acik: #E5484D;
    --kirmizi-bg: #FDECEA;
    --zemin: #F5F7F5;
    --kart: #FFFFFF;
    --metin: #1A241C;
    --gri: #667085;
    --kenar: #E4E8E5;
    --golge: 0 1px 3px rgba(16,24,20,.08), 0 8px 24px rgba(16,24,20,.05);
    --radius: 16px;
    --appbar-h: 56px;
    --nav-w: 240px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--zemin);
    color: var(--metin);
    font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", system-ui, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

/* ---------- App bar ---------- */
.app-bar {
    position: fixed; inset: 0 0 auto 0; z-index: 1030;
    height: calc(var(--appbar-h) + env(safe-area-inset-top));
    padding: env(safe-area-inset-top) 14px 0 14px;
    background: linear-gradient(120deg, var(--yesil-acik), var(--yesil));
    color: #fff;
    display: flex; align-items: center; justify-content: space-between;
    box-shadow: var(--golge);
}
.app-brand {
    display: flex; align-items: center; gap: 10px;
    color: #fff; text-decoration: none; font-weight: 700; font-size: 1rem;
}
.app-brand img { border-radius: 7px; background: #fff; }
.app-brand span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 60vw; }
.user-btn { background: rgba(255,255,255,.18); color: #fff; border: 0; border-radius: 999px; padding: 6px 14px; font-weight: 600; }
.user-btn:hover, .user-btn:focus { background: rgba(255,255,255,.28); color: #fff; }

/* ---------- Side nav (desktop) ---------- */
.side-nav { display: none; }
@media (min-width: 992px) {
    .side-nav {
        display: flex; flex-direction: column; gap: 4px;
        position: fixed; top: var(--appbar-h); left: 0; bottom: 0; width: var(--nav-w);
        background: var(--kart); border-right: 1px solid var(--kenar);
        padding: 16px 12px;
    }
    .side-nav .nav-link {
        display: flex; align-items: center; gap: 12px;
        padding: 12px 14px; border-radius: 12px;
        color: var(--metin); font-weight: 600; text-decoration: none;
    }
    .side-nav .nav-link span { font-size: 1.15rem; width: 24px; text-align: center; }
    .side-nav .nav-link:hover { background: var(--zemin); }
    .side-nav .nav-link.active { background: var(--yesil-bg); color: var(--yesil); }
}

/* ---------- Bottom nav (mobile) ---------- */
.bottom-nav {
    position: fixed; inset: auto 0 0 0; z-index: 1030;
    display: flex; justify-content: space-around;
    background: var(--kart); border-top: 1px solid var(--kenar);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom)) 4px;
}
.bottom-nav a {
    flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
    font-size: .68rem; font-weight: 600; color: var(--gri); text-decoration: none;
    padding: 4px 2px; border-radius: 10px;
}
.bottom-nav a span { font-size: 1.25rem; }
.bottom-nav a.active { color: var(--yesil); }
@media (min-width: 992px) { .bottom-nav { display: none; } }

/* ---------- Main ---------- */
.app-main {
    padding: calc(var(--appbar-h) + env(safe-area-inset-top) + 16px) 16px calc(80px + env(safe-area-inset-bottom)) 16px;
    max-width: 1100px;
}
@media (min-width: 992px) {
    .app-main { margin-left: var(--nav-w); padding-bottom: 40px; max-width: 1040px; }
}
.app-main.full {
    margin: 0 auto; padding: 0 16px;
    min-height: 100dvh; display: flex; align-items: center; justify-content: center;
    max-width: 460px;
}

h1, .h1 { font-size: 1.4rem; font-weight: 800; margin: 0 0 4px; }
.page-sub { color: var(--gri); margin-bottom: 18px; }

/* ---------- Cards ---------- */
.card { border: 1px solid var(--kenar); border-radius: var(--radius); box-shadow: var(--golge); }
.card-body { padding: 18px; }
.tile {
    background: var(--kart); border: 1px solid var(--kenar); border-radius: var(--radius);
    box-shadow: var(--golge); padding: 16px;
}

/* ---------- Evaluation choice ---------- */
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 480px) { .choice-grid { grid-template-columns: 1fr; } }
.choice {
    border: 0; border-radius: 22px; padding: 34px 18px; color: #fff;
    display: flex; flex-direction: column; align-items: center; gap: 12px;
    font-size: 1.15rem; font-weight: 800; text-decoration: none; cursor: pointer;
    box-shadow: var(--golge); transition: transform .08s ease;
}
.choice:active { transform: scale(.97); }
.choice .ic { font-size: 3.4rem; line-height: 1; }
.choice.olumlu { background: linear-gradient(150deg, #34C759, var(--yesil)); color: #fff; }
.choice.olumsuz { background: linear-gradient(150deg, #FF6B6B, var(--kirmizi)); color: #fff; }

/* ---------- Behavior chips ---------- */
.chip-list { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
    display: inline-flex; align-items: center; gap: 6px;
    border: 1.5px solid var(--kenar); background: var(--kart);
    border-radius: 999px; padding: 10px 16px; font-weight: 600; cursor: pointer;
    user-select: none; font-size: .95rem;
}
.chip input { display: none; }
.chip.olumlu.sel { background: var(--yesil-bg); border-color: var(--yesil-acik); color: var(--yesil); }
.chip.olumsuz.sel { background: var(--kirmizi-bg); border-color: var(--kirmizi-acik); color: var(--kirmizi); }

.mode-banner { border-radius: 14px; padding: 10px 16px; font-weight: 700; margin-bottom: 16px; }
.mode-banner.olumlu { background: var(--yesil-bg); color: var(--yesil); }
.mode-banner.olumsuz { background: var(--kirmizi-bg); color: var(--kirmizi); }

/* ---------- Forms ---------- */
.form-control, .form-select { border-radius: 12px; padding: 11px 14px; border-color: var(--kenar); }
.form-control:focus, .form-select:focus { border-color: var(--yesil-acik); box-shadow: 0 0 0 3px var(--yesil-bg); }
label.form-label { font-weight: 600; margin-bottom: 4px; }
.btn { border-radius: 12px; font-weight: 700; padding: 10px 18px; }
.btn-primary { background: var(--yesil); border-color: var(--yesil); }
.btn-primary:hover { background: var(--yesil-acik); border-color: var(--yesil-acik); }
.btn-danger { background: var(--kirmizi); border-color: var(--kirmizi); }
.btn-lg { padding: 14px 22px; font-size: 1.05rem; }

/* ---------- Student search results ---------- */
.student-result {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    padding: 12px 14px; border: 1px solid var(--kenar); border-radius: 12px; background: var(--kart);
    margin-bottom: 8px;
}
.student-result .meta { color: var(--gri); font-size: .85rem; }
.selected-student {
    display: flex; align-items: center; gap: 12px;
    background: var(--yesil-bg); border: 1px solid var(--yesil-acik); color: var(--yesil);
    border-radius: 14px; padding: 12px 16px; font-weight: 700; margin-bottom: 16px;
}

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--kenar); background: var(--kart); }
table.data { width: 100%; border-collapse: collapse; min-width: 520px; }
table.data th, table.data td { padding: 12px 14px; text-align: right; border-bottom: 1px solid var(--kenar); }
table.data th { background: var(--zemin); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--gri); }
table.data tr:last-child td { border-bottom: 0; }
.badge-olumlu { background: var(--yesil-bg); color: var(--yesil); padding: 3px 10px; border-radius: 999px; font-weight: 700; font-size: .8rem; }
.badge-olumsuz { background: var(--kirmizi-bg); color: var(--kirmizi); padding: 3px 10px; border-radius: 999px; font-weight: 700; font-size: .8rem; }

/* ---------- Stat tiles ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { background: var(--kart); border: 1px solid var(--kenar); border-radius: var(--radius); padding: 16px; box-shadow: var(--golge); }
.stat .n { font-size: 1.8rem; font-weight: 800; }
.stat .l { color: var(--gri); font-size: .85rem; font-weight: 600; }
.stat.g .n { color: var(--yesil); }
.stat.r .n { color: var(--kirmizi); }

.bar-row { display: grid; grid-template-columns: 160px 1fr 48px; align-items: center; gap: 10px; margin-bottom: 8px; }
.bar-row .name { font-size: .9rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--zemin); border-radius: 999px; height: 22px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 999px; }
.bar-fill.g { background: var(--yesil-acik); }
.bar-fill.r { background: var(--kirmizi-acik); }
.bar-row .val { text-align: left; font-weight: 700; font-size: .9rem; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin-bottom: 16px; }
.toolbar > div { display: flex; flex-direction: column; }

/* ---------- Auth ---------- */
.auth-card { width: 100%; background: var(--kart); border: 1px solid var(--kenar); border-radius: 22px; box-shadow: var(--golge); padding: 28px 24px; }
.auth-logo { display: flex; flex-direction: column; align-items: center; gap: 10px; margin-bottom: 20px; text-align: center; }
.auth-logo img { width: 64px; height: 64px; border-radius: 16px; }
.auth-logo h1 { font-size: 1.15rem; }

/* ---------- Print ---------- */
@media print {
    .app-bar, .side-nav, .bottom-nav, .no-print { display: none !important; }
    .app-main { margin: 0; padding: 0; max-width: none; }
    .card, .tile, .table-wrap { box-shadow: none; border-color: #ccc; }
    body { background: #fff; }
}