/* Login sayfası — kurumsal siyah + emerald */

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    background:
        radial-gradient(circle at 80% 10%, rgba(16, 185, 129, .18), transparent 50%),
        radial-gradient(circle at 10% 90%, rgba(4, 120, 87, .22), transparent 50%),
        linear-gradient(135deg, #0a0a0a 0%, #064e3b 70%, #047857 100%);
    color: #e5e7eb;
}

.login-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    color: #0a0a0a;
    border-radius: 18px;
    padding: 32px 28px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
    border: 1px solid #064e3b;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 22px;
}

.brand-logo {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, #0a0a0a, #047857);
    color: #d1fae5;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 18px rgba(4, 120, 87, .35);
}

.brand-name {
    font-size: 15px;
    font-weight: 700;
    color: #0a0a0a;
}

.brand-sub {
    font-size: 11px;
    color: #64748b;
    margin-top: 2px;
}

.login-card h1 {
    font-size: 22px;
    margin: 0 0 4px;
    color: #0a0a0a;
}

.muted {
    font-size: 13px;
    color: #64748b;
    margin: 0 0 22px;
}

.field { margin-bottom: 14px; }

.field label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: #334155;
    margin-bottom: 5px;
}

.field input {
    width: 100%;
    padding: 11px 13px;
    border: 1.5px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
    background: #f8fafc;
    color: #0a0a0a;
    font-family: inherit;
    transition: border-color .15s, background .15s, box-shadow .15s;
}

.field input:focus {
    outline: none;
    border-color: #047857;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(4, 120, 87, .18);
}

.btn-primary {
    width: 100%;
    margin-top: 8px;
    padding: 12px 14px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    color: #fff;
    background: linear-gradient(135deg, #0a0a0a, #047857);
    box-shadow: 0 8px 24px rgba(4, 120, 87, .35);
    transition: transform .08s, box-shadow .15s;
    font-family: inherit;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, #111111, #059669);
    box-shadow: 0 10px 28px rgba(4, 120, 87, .45);
}
.btn-primary:active:not(:disabled) { transform: translateY(1px); }
.btn-primary:disabled              { opacity: .6; cursor: not-allowed; }

.error {
    margin-top: 12px;
    color: #b91c1c;
    background: #fef2f2;
    border: 1px solid #fecaca;
    padding: 9px 12px;
    border-radius: 8px;
    font-size: 13px;
    min-height: 0;
    display: none;
}
.error:not(:empty) { display: block; }

.login-footer {
    margin-top: 22px;
    text-align: center;
    color: #94a3b8;
    font-size: 11px;
    border-top: 1px solid #e2e8f0;
    padding-top: 14px;
}