:root {
    --primary-color: #000;
    --primary-hover: #333;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-color: #333;
    --border-color: #ddd;
    --error-color: #ff4d4d;
    --success-color: #28a745;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: var(--text-color);
}

.auth-container {
    background: var(--card-bg);
    width: 100%;
    max-width: 400px;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}

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

.auth-logo {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.auth-title {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
}

.auth-subtitle {
    color: #666;
    font-size: 14px;
    margin-top: 5px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
    transition: all 0.3s;
    background: #fafafa;
}

.form-control:focus {
    border-color: var(--primary-color);
    background: #fff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.05);
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: #666;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

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

.alert {
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.alert-error {
    background: #fff5f5;
    color: var(--error-color);
    border: 1px solid #ffecec;
}

.alert-success {
    background: #f0fff4;
    color: var(--success-color);
    border: 1px solid #e6fffa;
}

.input-icon-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

.input-with-icon {
    padding-left: 38px;
}