:root {
    --primary-color:#101d30;
    --background-gradient: linear-gradient(135deg, #101d30 30%,rgb(34, 53, 83) 100%);
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    height: 100%;
}

body {
    height: 100%;
    min-height: 100%;
    margin: 0;
    display: grid;
    place-items: center;
    background: var(--background-gradient);
    padding: 20px;
    box-sizing: border-box;
}

.login-container {
    background: white;
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--card-shadow);
    text-align: center;
    max-width: 400px;
    width: 90%;
}

h1 {
    color: #2d3748;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.google-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 2rem;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0 auto;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
}

.google-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(66, 133, 244, 0.3);
}

.google-btn img {
    width: 20px;
    height: 20px;
}

.error-message {
    color: #e53e3e;
    background: #fee2e2;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    border: 1px solid #fecaca;
}

@media (max-width: 480px) {
    .login-container {
        padding: 1.5rem;
    }
}