/* --- Global Styles & Variables --- */
:root {
    --primary-color: #ff5733; /* The highlight color */
    --background-color: #111; /* Dark background */
    --surface-color: #090909;   /* Color for cards/forms */
    --text-color: #e0e0e0;      /* Light gray for text */
    --text-color-dark: #a0a0a0; /* Darker gray for subtitles */
    --border-color: #444;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* --- Sign-Up Container --- */
.signup-container {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 450px;
    text-align: center;
}

/* --- Logo --- */
.logo-container {
    margin-bottom: 30px;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: -1px;
}

.logo span {
    color: var(--primary-color);
}

/* --- Form Styles --- */
.signup-form h2 {
    margin-bottom: 10px;
    font-size: 1.8rem;
    color: #fff;
}

.signup-form .subtitle {
    margin-bottom: 30px;
    color: var(--text-color-dark);
}

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

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color-dark);
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background-color: #2a2a2a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input::placeholder {
    color: #666;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255, 87, 51, 0.2);
}

/* --- Button --- */
button[type="submit"] {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-color);
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button[type="submit"]:hover {
    background-color: #e64a2e; /* A slightly darker shade on hover */
    transform: translateY(-2px);
}

/* --- Login Link --- */
.login-link {
    margin-top: 25px;
    font-size: 0.9rem;
    color: var(--text-color-dark);
}

.login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: text-decoration 0.3s;
}

.login-link a:hover {
    text-decoration: underline;
}

/* --- Responsive Design --- */
@media (max-width: 480px) {
    .signup-container {
        padding: 30px 25px;
    }

    .logo {
        font-size: 2rem;
    }

    .signup-form h2 {
        font-size: 1.5rem;
    }
}