/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #e8f0fe;
    --text-primary: #333333;
    --text-secondary: #666666;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #e8f0fe 0%, #f5f7ff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(67, 97, 238, 0.1);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

/* Header styles */
.header {
    text-align: center;
    margin-bottom: 30px;
}

.header h1 {
    color: var(--primary-color);
    font-size: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Tabs styles */
.tabs {
    display: flex;
    margin-bottom: 30px;
    position: relative;
}

.tab {
    flex: 1;
    text-align: center;
    padding: 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    position: relative;
}

.tab.active {
    color: var(--primary-color);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

/* Form styles */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    background-color: #fafafa;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: white;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

input::placeholder {
    color: #bdbdbd;
}

.submit-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.submit-btn:hover {
    background-color: var(--primary-dark);
}

/* Error message styles */
.error-message {
    background: #fff3f3;
    color: #d32f2f;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.success-message {
    background: #e8f0fe;
    color: var(--primary-color);
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .container {
        padding: 30px 20px;
        margin: 15px;
    }
    
    .header h1 {
        font-size: 22px;
    }
    
    .form-group input,
    .submit-btn {
        font-size: 14px;
    }
}