* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 45%, #2563eb 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #111827;
}

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

.login-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: 24px;
    padding: 36px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.28);
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 28px;
}

.login-logo {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    background: linear-gradient(135deg, #2563eb, #38bdf8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    font-weight: 800;
}

.login-brand h1 {
    margin: 0;
    font-size: 28px;
    line-height: 1.1;
    color: #0f172a;
}

.login-brand p {
    margin: 4px 0 0;
    color: #64748b;
    font-size: 14px;
}

.login-title {
    margin: 0 0 8px;
    font-size: 22px;
    color: #111827;
}

.login-subtitle {
    margin: 0 0 24px;
    color: #6b7280;
    font-size: 15px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 7px;
    font-weight: 700;
    font-size: 14px;
    color: #374151;
}

.form-group input {
    width: 100%;
    border: 1px solid #d1d5db;
    border-radius: 14px;
    padding: 13px 14px;
    font-size: 15px;
    outline: none;
    transition: all 0.2s ease;
}

.form-group input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.login-button {
    width: 100%;
    border: none;
    border-radius: 14px;
    padding: 14px 16px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    margin-top: 8px;
    transition: all 0.2s ease;
}

.login-button:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.login-footer {
    margin-top: 24px;
    padding-top: 18px;
    border-top: 1px solid #e5e7eb;
    color: #64748b;
    font-size: 13px;
    text-align: center;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    padding: 12px 14px;
    border-radius: 14px;
    margin-bottom: 18px;
    font-size: 14px;
    font-weight: 700;
}

@media (max-width: 520px) {
    .login-card {
        padding: 28px 22px;
        border-radius: 20px;
    }

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