* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1f2937;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 18px;
    padding: 35px;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.10);
}

.logo {
    width: 58px;
    height: 58px;
    margin: 0 auto 15px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #2563eb;
    color: white;
    font-size: 30px;
    font-weight: bold;
}

h1 {
    text-align: center;
    margin: 0;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin: 8px 0 28px;
}

label {
    display: block;
    margin: 16px 0 7px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 13px;
    border: 1px solid #d1d5db;
    border-radius: 9px;
    font-size: 16px;
}

button {
    width: 100%;
    margin-top: 22px;
    padding: 13px;
    border: 0;
    border-radius: 9px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    opacity: 0.92;
}

.message {
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 14px;
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
}

.message.success {
    background: #dcfce7;
    color: #166534;
}

.hint {
    text-align: center;
    color: #6b7280;
    font-size: 13px;
    margin: 20px 0 0;
}