* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100%;
    min-height: 100%;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #1f2937;
}

.login-page {
    width: 100%;
    min-height: 100vh;
    padding: 30px 20px;

    display: flex;
    align-items: center;
    justify-content: center;

    background:
        linear-gradient(
            rgba(0, 0, 0, 0.42),
            rgba(0, 0, 0, 0.42)
        ),
        url("/arkaplan.png") center center / cover no-repeat fixed;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 38px 36px;

    background: #ffffff;
    border-radius: 18px;

    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.28);

    backdrop-filter: blur(6px);
}

.logo-container {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

.login-logo {
    display: block;
    width: auto;
    max-width: 190px;
    max-height: 110px;
    object-fit: contain;
}

.login-card h1 {
    margin-bottom: 8px;
    text-align: center;
    font-size: 27px;
    font-weight: 700;
    color: #111827;
}

.login-description {
    margin-bottom: 28px;
    text-align: center;
    font-size: 14px;
    line-height: 1.6;
    color: #6b7280;
}

.alert {
    margin-bottom: 20px;
    padding: 12px 14px;

    border: 1px solid #fecaca;
    border-radius: 9px;

    background: #fef2f2;
    color: #b91c1c;

    font-size: 14px;
    line-height: 1.5;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;

    font-size: 14px;
    font-weight: 600;
    color: #374151;
}

.form-group input {
    width: 100%;
    height: 48px;
    padding: 0 14px;

    border: 1px solid #d1d5db;
    border-radius: 9px;

    background: #ffffff;
    color: #111827;

    font-size: 15px;
    outline: none;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.form-group input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.login-button {
    width: 100%;
    height: 49px;
    margin-top: 4px;

    border: none;
    border-radius: 9px;

    background: #1d4ed8;
    color: #ffffff;

    font-size: 15px;
    font-weight: 700;
    cursor: pointer;

    transition:
        background 0.2s ease,
        transform 0.2s ease;
}

.login-button:hover {
    background: #1e40af;
}

.login-button:active {
    transform: translateY(1px);
}

@media (max-width: 520px) {
    .login-page {
        padding: 20px 15px;
    }

    .login-card {
        padding: 30px 22px;
        border-radius: 14px;
    }

    .login-logo {
        max-width: 160px;
        max-height: 90px;
    }

    .login-card h1 {
        font-size: 24px;
    }
}