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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #080b11;
    color: #ffffff;
    min-height: 100vh;
}

.login-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: rgba(15, 20, 30, 0.95);
    border: 1px solid rgba(76, 201, 240, 0.25);
    border-radius: 14px;
    padding: 40px;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
    text-align: center;
}

.logo {
    width: 180px;
    max-width: 80%;
    margin-bottom: 30px;
}

h1 {
    font-size: 26px;
    margin-bottom: 10px;
}

.subtitle {
    color: #9aa4b2;
    font-size: 14px;
    margin-bottom: 30px;
}

.input-group {
    text-align: left;
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 14px;
    color: #cbd5e1;
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    padding: 13px 14px;
    border-radius: 8px;
    border: 1px solid #273244;
    background: #0b111b;
    color: #ffffff;
    outline: none;
    font-size: 15px;
}

.input-group input:focus {
    border-color: #4cc9f0;
    box-shadow: 0 0 0 2px rgba(76, 201, 240, 0.1);
}

button {
    width: 100%;
    padding: 13px;
    margin-top: 5px;

    border: none;
    border-radius: 8px;

    background: #4cc9f0;
    color: #05080d;

    font-size: 15px;
    font-weight: bold;

    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    opacity: 0.85;
}

.error-message {
    min-height: 20px;
    margin-top: 15px;
    color: #ff5c5c;
    font-size: 14px;
}

.back-link {
    display: inline-block;
    margin-top: 25px;

    color: #4cc9f0;
    text-decoration: none;

    font-size: 14px;
}

.back-link:hover {
    text-decoration: underline;
}