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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.signup-container {
    width: 100%;
    max-width: 480px;
}

.signup-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.signup-header {
    text-align: center;
    margin-bottom: 30px;
}

.signup-header h1 {
    color: #333;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.signup-header p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.messages {
    margin-bottom: 20px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 14px;
}

.alert-error {
    background-color: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background-color: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

.signup-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.signup-form .form-group {
    margin-bottom: 20px;
}

.signup-form label {
    display: block;
    color: #333;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
}

.signup-form input[type="text"],
.signup-form input[type="email"],
.signup-form input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
}

.signup-form input[type="text"]:focus,
.signup-form input[type="email"]:focus,
.signup-form input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-hint {
    display: block;
    color: #999;
    font-size: 12px;
    margin-top: 6px;
}

.checkbox-group {
    margin-bottom: 24px;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    color: #666;
    font-size: 14px;
    font-weight: normal;
}

.checkbox-container input[type="checkbox"] {
    margin-right: 8px;
    margin-top: 2px;
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox-container a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.checkbox-container a:hover {
    text-decoration: underline;
}

.btn-signup {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-signup:active {
    transform: translateY(0);
}

.signup-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e1e8ed;
    font-size: 14px;
    color: #666;
}

.signup-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.signup-footer a:hover {
    text-decoration: underline;
}

/* Mobile Responsive */
@media (max-width: 580px) {
    .signup-card {
        padding: 30px 24px;
    }

    .signup-header h1 {
        font-size: 24px;
    }

    .signup-form .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

@media (max-width: 400px) {
    body {
        padding: 15px;
    }

    .signup-card {
        padding: 24px 20px;
    }

    .signup-header h1 {
        font-size: 22px;
    }

    .signup-header p {
        font-size: 13px;
    }

    .btn-signup {
        padding: 12px;
        font-size: 15px;
    }

    .signup-form input[type="text"],
    .signup-form input[type="email"],
    .signup-form input[type="password"] {
        width: 100%;
        padding: 12px 16px;
        border: 2px solid #e1e8ed;
        border-radius: 8px;
        font-size: 15px;
        transition: all 0.3s ease;
    }

    .signup-form input.form-control {
        width: 100%;
        padding: 12px 16px;
        border: 2px solid #e1e8ed;
        border-radius: 8px;
        font-size: 15px;
        transition: all 0.3s ease;
    }

    .signup-form input[type="text"]:focus,
    .signup-form input[type="email"]:focus,
    .signup-form input[type="password"]:focus,
    .signup-form input.form-control:focus {
        outline: none;
        border-color: #667eea;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }
}
.form-section-title {
    color: #667eea;
    font-size: 16px;
    font-weight: 700;
    margin: 20px 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid #e1e8ed;
}

.form-section-title:first-of-type {
    margin-top: 0;
}