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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    background: linear-gradient(135deg, #fef8f0 0%, #fff9ed 50%, #ffffff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-box {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.1);
    padding: 50px 40px;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 900;
    color: #1a1a1a;
    margin-bottom: 10px;
}

.login-header p {
    font-size: 15px;
    color: #666;
}

.login-form {
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.form-group input {
    width: 100%;
    padding: 15px 18px;
    border: 2px solid #e5e5e5;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: #1a1a1a;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
    display: none;
}

.error-message.show {
    display: block;
}

.login-btn {
    width: 100%;
    padding: 16px;
    background: #1a1a1a;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.login-btn:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.login-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
}

.back-link {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.back-link:hover {
    color: #1a1a1a;
}

@media (max-width: 768px) {
    .login-box {
        padding: 40px 30px;
    }
    
    .login-header h1 {
        font-size: 24px;
    }
}