:root {
    --navy: #001d3d;
    --navy-2: #003566;
    --navy-3: #334e68;
    --amber: #ffbf00;
    --amber-deep: #e6a800;
    --live: #00a859;
    --cream: #fff8eb;
    --bg: #f3f6fb;
    --card: #ffffff;
    --text: #102a43;
    --muted: #627d98;
    --line: #d9e2ec;
    --ok: #27ab83;
    --danger: #d64545;
    --info: #2cb1bc;
    --radius: 16px;
    --shadow: 0 10px 30px rgba(16, 42, 67, 0.08);
    --sidebar: 268px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
    font-family: Nunito, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
}

a { color: inherit; text-decoration: none; }
.muted { color: var(--muted); margin: 0; }

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar);
    background: linear-gradient(180deg, var(--navy), #0b1d30);
    color: #fff;
    padding: 22px 16px;
    overflow-y: auto;
    z-index: 20;
}
.brand { display: block; margin-bottom: 22px; text-align: center; }
.brand img { width: 100%; border-radius: 14px; background: #000; display: block; }
.brand small { display: block; color: #9fb3c8; font-size: 12px; margin-top: 8px; }
.nav-label { margin: 18px 8px 8px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: #9fb3c8; }
.nav-link {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 12px; color: #d9e2ec; margin-bottom: 4px;
}
.nav-link i { width: 18px; text-align: center; }
.nav-link:hover, .nav-link.aktif { background: rgba(240,180,41,.16); color: #fff; }

.shell { margin-left: var(--sidebar); min-height: 100vh; }
.topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 22px 28px 8px; gap: 16px;
}
.topbar h1 { margin: 0; font-size: 26px; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.user-chip { text-align: right; }
.user-chip small { display: block; color: var(--muted); }
.content { padding: 12px 28px 40px; }

.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}
.kpi { display: flex; justify-content: space-between; align-items: flex-start; }
.kpi .ikon {
    width: 46px; height: 46px; border-radius: 12px;
    display: grid; place-items: center; background: var(--cream); color: var(--amber-deep);
}
.kpi b { font-size: 28px; display: block; }
.kpi span { color: var(--muted); font-size: 13px; }

.btn, button.btn, input[type=submit].btn {
    border: 0; border-radius: 12px; padding: 10px 16px; font-weight: 700;
    font-family: inherit; cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
}
.btn.primary { background: var(--navy); color: #fff; }
.btn.amber { background: var(--amber); color: var(--navy); }
.btn.ok { background: var(--ok); color: #fff; }
.btn.danger { background: var(--danger); color: #fff; }
.btn.info { background: var(--info); color: #fff; }
.btn.ghost { background: #fff; border: 1px solid var(--line); color: var(--navy); }
.btn.block { width: 100%; justify-content: center; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
label { display: block; font-size: 13px; font-weight: 700; margin-bottom: 6px; }
input, select, textarea {
    width: 100%; padding: 11px 12px; border-radius: 12px; border: 1px solid var(--line);
    font-family: inherit; font-size: 14px; background: #fff;
}
textarea { min-height: 90px; resize: vertical; }
.span-2 { grid-column: span 2; }

.alert { padding: 12px 14px; border-radius: 12px; margin-bottom: 16px; }
.alert-ok, .alert-success { background: #e6f6f0; color: #147d64; }
.alert-hata, .alert-error { background: #ffeeee; color: #9b2c2c; }
.alert-uyari { background: var(--cream); color: #b44d12; }

.badge { display: inline-block; padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.ok { background: #e6f6f0; color: #147d64; }
.badge.warn { background: var(--cream); color: #b44d12; }
.badge.mute { background: #eef2f6; color: var(--muted); }
.badge.info { background: #e0fcff; color: #0e7c86; }

.login-wrap {
    min-height: 100vh; display: grid; place-items: center;
    background: radial-gradient(circle at top left, #f0b429 0, #102a43 42%, #0b1d30 100%);
    padding: 24px;
}
.login-card {
    width: min(440px, 100%); background: #fff; border-radius: 24px; padding: 36px 32px;
    box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.login-card h1 { margin: 8px 0 6px; }
.login-hero { width: 64px; height: 64px; border-radius: 18px; background: var(--cream); color: var(--amber-deep); display: grid; place-items: center; font-size: 28px; }
.login-logo { width: 100%; border-radius: 16px; background: #000; margin-bottom: 12px; display: block; }

.map { height: 380px; border-radius: 16px; overflow: hidden; }
.leaflet-routing-container { display: none; }
.rota-ozet { margin-top: 12px; padding: 12px 14px; background: var(--cream); border-radius: 12px; }
.route-item {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 12px; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px; background: #fff;
    cursor: grab;
}
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.okul-switch select { min-width: 200px; }

@media (max-width: 1100px) {
    .grid-4, .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
    .sidebar { position: relative; width: 100%; }
    .shell { margin-left: 0; }
    .grid-4, .grid-3, .grid-2, .form-grid { grid-template-columns: 1fr; }
    .span-2 { grid-column: auto; }
    .topbar, .content { padding-left: 16px; padding-right: 16px; }
}